Literacy practices in co-taught early years classrooms . Study protocol : The seaside case

The present protocol describes the background, theoretical framework and methods for a qualitative study of co-taught, Norwegian, L1 classrooms—The Seaside case. The participants are six classes and their teachers from six different schools in the Seaside municipality. All classes had one extra teacher in all 8 L1 Norwegian lessons each week, in Year One and Year Two. Co-teaching provides pedagogic potential and flexibility and can enhance students’ learning. However, evidence from teacher–student ratio research is inconsistent across contexts (Solheim et al., 2017; Solheim & Opheim, 2018), and there is also a need for studies exploring connections specifically in the Norwegian school context. Our overarching research questions are: (1) What characterizes literacy practices in L1 initial co-taught literacy lessons? (2) How is the extra teacher resource utilized in L1 initial co-taught literacy lessons, and what characterizes interaction, patterns of discourse, organization and roles in the classroom (teachers and students)? (3) What are the students’ conditions for participation, engagement and dialogue in L1 initial co-taught literacy lessons?


Introduction
Teacher-student ratio is often noted as a structural constraint supporting the status quo and limiting that which is feasibly possible to achieve in the classroom. It could seem evident that a higher teacher-student ratio, or smaller classes, would serve to remove such a constraint and thereby be an important contextual condition for promoting student learning through increased interaction, engagement and differentiation within the classroom. However, it is unclear whether increased teacherstudent density itself actually promotes a higher quality of the learning, as evidence Literacy practices in co-taught early years classrooms 71 from research is inconsistent (Solheim et al., 2017;Solheim & Opheim, 2018). Such mixed outcomes provide an impetus for the design of this research.
The Seaside case was originally designed to provide observational data, from real life classrooms, as a point of reference in the overall work of understanding the results from a large RCT investigating the individual and complementary effects of a higher teacher-student ratio and professional development for teachers in L1 initial literacy education (Two Teachers in the Class, Solheim et al., 2017) (see Appendix 1 for more information on the RCT). Above and beyond the complementary benefits of the case to the RCT's quantitative analysis, the case holds great value in itself, as a comprehensive qualitative study of teaching practices in Norwegian L1 classrooms. The timing of this research is particularly relevant because educational policy and curricula increasingly emphasize students' active learning and other progressive ideas about education, without necessarily having extensive and systematic insight into the process and everyday life in Norwegian classrooms. An important shift in the conditions for our study, was a new norm for teacher-student ratio implemented for Norwegian schools in autumn 2018, stating that there should be a maximum of 15 students per teacher from Year One through Year Four. This policy adds relevance to this work, as more than one teacher in L1 lessons would be more of a normal situation after the implementation of the new norm.
In the Seaside case we specifically study literacy practices in six primary school classrooms where there are two teachers present in the L1 subject. Research on literacy practices in early literacy education is scarce in the Norwegian context. Internationally, the research focus places much emphasis on teacher expertise (e.g. Hall, 2012) and effectiveness (e.g. Hall, 2012;Goigoux et al., 2016), but relatively little emphasis on the extended early literacy practice in itself. The Seaside case allows for research in a variety of areas (e.g., writing, oracy, guided reading) which is connected through a shared theoretical grounding. Specifically, we see practice as a social and cultural space for interaction and learning, consisting of a set of key elementsparticipants, actions, setting in time and space, and artefacts. Rooted in a sociocultural understanding of language, learning and literacy, our approach also implies a focus on student participation and dialogic aspects of that which happens in the observed classrooms.
Our overarching research questions are as follows: 1) What characterizes literacy practices in L1 initial co-taught literacy lessons?
2) How is the extra teacher resource utilized in L1 initial co-taught literacy lessons, and what characterizes interaction, patterns of discourse, organization and roles in the classroom (teachers and students)? 3) What are the students' conditions for participation, engagement and dialogue in L1 initial co-taught literacy lessons?
These research questions will be answered through various scientific works detailed below (see Methods for analyses and Dissemination).

Background
The Norwegian school context In Norway, most children attend kindergarten (one-five years) full time. The Norwegian kindergarten builds on a sociocultural approach emphasizing overall learning (The Norwegian Directorate for Education and Training, 2017), where the attitude is child-centred and founded on values such as care and development, play and relationships, and children's participation. There are no strict boundaries between informal and formal learning situations, and the kindergarten teacher will, to a large extent, allow informal child-initiated activities to be the starting points for learning situations, on children's premises. This approach differs from the far more subject and outcome-oriented Early Education tradition found in many other countries. Norwegian children start formal school in August of the calendar year in which they turn six and attend primary school for seven years. Norwegian school is free and inclusive, with a strong focus on alleviating social differences. There are no grades in primary school, only formative assessments, and competence goals appear in the syllabus only after Year Two. There are few alternative programs and no streaming or tracking. Norway has a centralized curriculum (The Norwegian Directorate for Education and Training, 2018), but allows considerable freedom for local schools and teachers to make their own decisions regarding organization and instructional methods. Even if literacy education is integrated in all subjects, the curriculum ascribes a particular responsibility to the L1 Norwegian subject.
Educational policy and reality Teachers, school leaders, politicians and scientists often share an ideal of committed students who solve relevant problems (in all subjects) and apply knowledge when facing new situations and new problems (Ludvigsen et al., 2015;Pellegrino & Hilton, 2013). Norwegian schools are facing the implementation of a new curriculum autumn 2020, Fagfornyelsen, 1 (The Renewal of the disciplines) in which ideas like these are prominent. It is easy to agree that this form of in-depth and active learning should be central to school. However, many roadblocks can appear between the current status of schools and the realization of this bold vision.
Specifically, despite a relatively strong focus on student participation in current Norwegian curricula, it seems reasonable to say that "traditional practice" (Cazden, 2001;Goodlad, 2004;Hicks, 1996) prevails in Norwegian schools. For example, Hodgson et al. (2012) found that 62 % of lessons were spent on whole class teaching, and that these whole class sessions were characterized by a lack of instructional depth. Another typical feature of whole class teaching is that it is dominated by the teacher, both structurally and quantitatively. Teachers normally talk 2/3 of the time (cf. the "2/3 rule", Klette, 2003), thus crowding out student voices.
Structurally, form and content support each other, often manifesting in an IRE-structure (teacher Initiation-student Response-teacher Evaluation). IRE, or variants of it, provides students and teachers with predetermined roles to play in the classroom practice. The dramaturgic structure of the IRE clearly serves a function and might also be seen as a precondition for teaching a class of 20-30 students. Over several decades, however, research has also emphasized how this form may limit the opportunity space for meaningful participation, and thus in itself inhibit substantive engagement, and at best making space for procedural engagement (Nystrand & Gamoran, 1991).
Traditional practice along with the IRE structure in classroom interaction seems highly resistant to change (Alexander, 2008;Lefstein, 2008;Segal & Lefstein, 2016;WIlkinson et al., 2017). As curricular reforms continue to elaborate an image of problem-based education, critical thinking, in-depth learning and an overall image of students participating in the production of knowledge, we might fear an increasing gap between policy and real-life practices. Furthermore, digital resources are increasingly available in Norwegian classrooms, providing teachers and students with new dialogic spaces (Wegerif, 2013), as well as an enhancement of existing ones. But some researchers have found unintended effects towards the opposite-that students increasingly work alone and in isolation (Gilje et al., 2020;Slotte, 2019), thus replicating the traditional practice in a modern media. Yet, when considering literacy teaching practice specifically, the need for students to orally practice in different discourses, write across genres and apply new vocabulary is particularly central to their development. In total, these trends of traditional practice are troubling due to the importance of interaction between teachers and students in the literacy classroom and the motivation behind increased teacherstudent ratios.
Teacher-student ratio In general, a higher teacher-student ratio provides possibilities for early literacy practice. A higher teacher-student ratio can enhance more individual attention (Blatchford et al., 2007) and higher engagement in learning activities (Bressoux, 2016), resulting in improved student progress. One way of increasing the teacher-student ratio is co-teaching (Solheim & Opheim, 2018). Several benefits of co-teaching have been emphasized. Some research indicates that co-teaching leads to higher academic learning for students with disabilities, language delays, and emotional risks (Friend & Barron, 2016;Mackey et al., 2018). Positive learning outcomes have also been reported for second language students (Mackey et al., 2018) and gifted students (Hughes & Murawski, 2001). Further, co-teaching environments are reported to improve students' social interactions and collaboration, for students with and without special needs (Villa et al., 2013;Walsh, 2012). However, not all research points to the benefits of co-teaching, neither concerning student outcomes (Friend & Barron, 2016;Murawski & Swanson, 2001), nor when it comes to teachers' experiences (Carty & Farrell, 2018). Succeeding with co-teaching also depends on how teachers co-plan (Brown et al., 2013), as well as their forms of cooperation in the classroom. It seems that students benefit more from types of teacher collaboration that involve and exploit the expertise of both teachers (Wexler et al., 2018). Summing up, co-teaching provides pedagogic potential and flexibility, but is no guarantee for better student learning.
The organizational structure of co-teaching (and the extent to which it allows each teacher to draw upon their strengths) may contribute to its success and student outcomes. Friend, et al. (2010, p. 12) describe six potential forms of teacher collaboration: (1) One teach, one observe, where one teacher leads large-group instruction while the other collects academic, behavioural, or social data on specific students or the class as a whole; (2) Station teaching, where groups of students rotate from station to station, and are taught by the teachers at two stations, while working independently at the third; (3) Parallel teaching, where the two teachers split the class in two equal parts, and present the same material for both. The goal here would be increased differentiation and student participation; (4) Alternative teaching, where one teacher works with most students while the other teacher works with a small group; (5) Teaming, where both teachers lead large-group instruction, and both of them lecture, represent different views in a debate or illustrating two ways to solve a problem, and (6) One teach, one assist, where one teacher leads instruction while the other circulates among the students offering individual assistance.
Yet, in previous studies regarding teacher collaboration, despite the numerous options for collaboration, Alexander (1997) reported that many teachers found it difficult to work alongside another, and preferred to work with separate groups, independently and/or physically separated. Also, the designated classroom teacher would often struggle with sharing territory and ownership with another teacher, whereas the second teacher would struggle with a feeling of not getting access. One can assume that the different forms of teacher collaboration (and potential levels of conflict) will influence possibilities for student participation and learning.
Ideally, being two teachers in early literacy education can allow more time for small group guided reading and writing activities, more differentiation in text choices offered, or individualized reading and writing lessons for different groups of students. The additional teacher could also give room for engaging dialogues on texts, and for talk, interaction and truly collaborative work. Yet, teachers often struggle to adapt their teaching to a higher teacher-student ratio or to fully take advantage of the opportunities provided by co-teaching (Blatchford et al., 2007;Solheim & Opheim, 2018), instead, often relying on whole class teaching, without profiting from the flexibility of the classroom context (Blatchford et al., 2007). Thus, a higher teacher-student ratio is no guarantee for more interaction and engagement or for student literacy success.
Literacy practices in co-taught early years classrooms 75 Early literacy education Within a socio-cultural approach to early literacy education, student participation and engagement are seen as important premises for high quality teaching, in any subject. Hall (2012) shows that high quality classrooms are more discursive, conversational and dialogic places to be, and that negotiation, tentativeness and power-sharing are important features. Howe et al. (2019) find that elaboration and querying of previous contributions, along with extensive student participation, are positively associated with curriculum mastery. Classrooms with a high degree of dialogic participation have shown higher reading achievement and deeper understanding in students (Applebee et al., 2003;Muhonen et al., 2018), higher student engagement and improved citizenship skills (Wegerif, 2016), as well as increased student reasoning and elaboration (Boyd & Kong, 2017;Wegerif et al., 1999;Wilkinson et al., 2015).
Shifting now to the literacy discipline, as literacy can be defined as a "collection of cultural and communicative practices shared among members of particular groups", 2 it is particularly relevant that literacy instruction should emphasize participation and effective communication. Accordingly, literacy teachers should organize discussions on texts (Murphy et al., 2009) and incite high student participation (Hall, 2012). Likewise, activities, where the teacher is able to achieve a strong commitment amongst the students, are shown to be advantageous for younger students' literacy learning (Goigoux et al., 2016).
Meaning is a driving force in literacy growth (Hall, 2012) and therefore also in effective literacy education, particularly during the early years. This implies the integration and balancing of learning the codes of written language along with the uses and purposes of literacy which are more meaningful to the learner (Hall, 2012;Parr & Limbrick, 2010). Furthermore, teachers must provide extensive opportunities for younger students to read and respond to children's literature and to write for a variety of authentic purposes (Hall, 2012). Exemplary teachers offer a broad spectrum of interesting and engaging texts (Williams et al., 2009), often emphasize themes taught through cross-curricular connections (Morrow et al., 1999), and give the young students a variety of literacy experiences, from partner reading, shared reading and guided reading to independent reading; from students' own book choice to explicit instruction; and from daily writing in journals to workshop settings and mini-lessons-all based on students' needs (Hall, 2012). Also, as Knapp (1995, p. 74) underlines, it is a characteristic of excellent teachers that skills are taught as tools to be used immediately (or very soon) in the work of making sense of the printed page, not be mastered for their own sake without application. However, in the age of scientifically based reading curriculum, the focus on meaning can unfortunately be eclipsed by pressure that teachers perceive for young children to master conventional reading skills, particularly those that will be assessed on formal tests (Spencer, 2011). Therefore, at this time of much curricular change and increased assessments, the processes occurring in the classroom are critical to study.
Further, teacher responsiveness and proximity are also core components of high quality and effective literacy education (Goigoux et al., 2016). Effective teachers organize the classrooms in flexible ways that invite both whole-group, small-group, paired, and one-to-one teaching (Hall, 2012). Especially lower-achieving students profit from time spent with the teacher (this has an effect on decoding, reading, linguistic skills and comprehension; Goigoux et al., 2016). Unfortunately, when students spend much time alone, on individual reading or exercises, without the teacher closely following, differences between high and low performing students increase (Goigoux et al., 2016). Effective teachers therefore spend more time in small-group teaching, which may include teacher-directed text activity, literature circles, and explicit teaching in phonics, comprehension and vocabulary (Goigoux et al., 2016). High quality teachers also offer differentiated instruction (Hall, 2012), observe and evaluate their students' literacy development regularly (Duke & Del Nero, 2011), have a thorough knowledge of each student's level, and are poised to seize the "teachable moment" (Hall, 2012).
However, continually enacting participating, responsive and engaging instructional practices is challenging for teachers, thus smaller class sizes, or higher teacherstudent ratio have been offered as a scaffold to support teachers in this quest.

Theoretical framework: A social conception of literacy practices
As defined earlier, the Seaside case is rooted in the socio-cultural theory of language, learning and literacy. Along with the Russian psychologist Lev Vygotsky (1978Vygotsky ( , 1986, we consider language to be a system of tools for higher order thinking (mediated thinking), which develops in the individual child as a process of internalization based on participation in meaningful social action (social mediation). Vygotsky has been and is an inspiration for different fields of research, very often in conjunction with another Russian scholar, the literary scholar and language philosopher Mikhail Bakhtin, known for his influential work on interaction and dialogic relationships between voices and minds. Vygotsky and Bakhtin complement each other (cf. Holquist, 2003;Wertsch, 1991), and together they form the basis for both a social approach to literacy often referred to as New Literacy Studies (Gee, 2000) and a broad branch of educational research which we will refer to as dialogic education or dialogic teaching. Wegerif (2016) suggests the term dialogic literacy as a way of linking literacy education and classroom talk as resources for the development and teaching of thinking in school. This link between literacy, talk and thinking in educational practice is a key frame of reference in the Seaside case study.
As literacy is a many-faceted phenomenon, it can be studied from different vantage points. The Seaside case considers literacy as a social phenomenon in the tradition of New Literacy Studies (Gee, 2000). New Literacy Studies has typically employed an ethnographic approach to situations where people are engaged in activities that involve the use of texts. From the outset the pioneers turned towards out-of-school contexts, describing literacy events (Heath, 1983) and literacy practices (Street, 1984) conceived of as social structures to be analysed based on observation and interviews with the participants. The understanding of these events and practices has subsequently turned into key concepts in the New Literacy Studies' approach to literacy. Ironically, even though this approach started out with an ambition of releasing the understanding of literacy from association with the dominant view of literacy as something taught in school, it has eventually also turned out to be highly productive perspectives on what goes on in school (Ivanič, 2009), often in combination with a focus on classroom discourse (cf. Bloome et al., 2004).
Inspired by New Literacy Studies, we consider literacy as a matter of access on different levels (written signs, text meaning and cultural perspectives, cf. Skaftun, 2015) and, correspondingly, that the teaching of literacy has different purposes as it progresses from basic literacy, through intermediate literacy to disciplinary literacy (Shanahan & Shanahan, 2008). In school, this progression is to a high degree associated with talk about texts (Skaftun, 2020). Literacy events in school are determined by underlying practices, and they continuously contribute to changing or sustaining such practices.
Practice is a fundamental concept in sociocultural approaches to literacy (cf. Barton, 1994;Gee, 1996Gee, , 2009) and discourse (Bloome et al., 2004;Gee, 2014;van Leeuwen, 2008). The social structure of a practice consists of a set of key elements-participants, actions, setting (time and space), and artefacts-and can also be further broken down into aspects of these elements, as in van Leeuwen's approach to discourse and practice (van Leeuwen, 2008). Of particular importance to the Seaside case is what van Leeuwen calls eligibility conditions for participation. Traditional practice provides teachers and students with tightly scripted conditions which are evidently visible in classroom interaction. The dominant talk genres (Bakhtin, 1986;Mortimer & Scott, 2003) are often based on the previously mentioned IRE pattern of classroom discourse, where the teacher has the initiative and evaluates student response. Acquiring the genres of classroom discourse is an important part of the social learning that takes place during the first years of school (Mehan, 1979), and over time these conditions for participation are mastered to perfection by the students. Dialogic teaching focuses on opening dialogue (Nystrand, 1997) or expanding the repertoire of talk for learning and teaching (Alexander, 2008) to include dialogic space (Wegerif, 2013) and the opportunity for students to make use of their own voices and to be heard (Segal & Lefstein, 2016).
Curricular reforms in our millennium (Ministry of Education and Research, 2006; The Norwegian Directorate for Education and Training, 2020 3 ) increasingly emphasize student participation and active learning, and also the professional community of teachers working together to develop and renew practices in their schools and classrooms. The teacher norm (2018) is an important part of this picture, as a means for supporting teachers in making space for productive approaches to learning in early years education. When an extra teacher is added in the classroom, the social order of the practice can be altered quite substantially. The extent and the direction of the change depends on a set of conflicting forces that might be simplified as a struggle between the pull back effect of traditional practice and the push forward effect of innovation. Traditional practice (Goodlad, 2004;Hicks, 1996) is typically associated with teacher control and discipline as conditions for learning, whereas progressive approaches aim for students working actively on their understanding (Barnes, 1990). This struggle is not a new one. A long tradition of progressive pedagogy (Biesta, 2013;Dewey, 2018;Freire & Macedo, 1987;Mercer et al., 2019) has been working towards changing the structures of participation in the classroom. This task has proven to be a difficult one (Barnes, 2008;Lefstein, 2008;Møller et al., 2009). Both teachers and students are deeply rooted in underlying understandings of knowledge, learning and teaching (Argyris & Schön, 1978;Barnes & Shemilt, 1974;Wilkinson et al., 2017), which will determine how the added teacher resource affects the classroom practice. The Seaside case will provide real life images of the tension between overall governmental intentions and educational practices.

Participants and sampling
The participants in the Seaside case are six classes and their teachers from six different schools in the Seaside municipality. All schools participate in the Two Teachers in the Class RCT (see Appendix 1), and the classes volunteering to be part of the Seaside case are all intervention classes, meaning that they had one extra teacher in all 8 L1 Norwegian lessons each week, in Year One and Year Two.
In Norwegian Years One to Four the class teacher (T1) teaches most lessons. This is the case also for our Seaside classes. Also, in all classes, the additional teacher (T2) is involved either in another subject or as a special needs teacher, and thus a familiar adult. Table 1 shows an overview of the six classes regarding class BEd = Bachelor of Education (3-4 years of teacher education) *) University or college education of 3 years or less **) The T2 resource was not given to one specific teacher but alternated between different teachers. size and number of students in grade and school, as well as the teachers' education and experience.
Making the case The case is well suited for studies of rich phenomena and thus appropriate for the kind of holistic approach we sought. While the main strength of the RCT is breadth, the case gives depth; detail, richness, and within-case variance (Flyvbjerg, 2011), and offers vital evidence to complement more experimentally organized effect studies. Case studies are also relevant when it comes to seeking to explain the 'hows' and 'whys' that require extensive and in-depth description of social phenomena (Yin, 2014), as well as good opportunities to learn (Stake, 2013). As noted previously, this is highly relevant both when it comes to providing contextual background for a deeper understanding of the results of the Two Teachers in the Class RCT, and also when it comes to giving a deeper insight into literacy practices taking place in the everyday life of classrooms, classroom processes, roles and teacher cooperation that occur under different conditions. Finally, the implementation of the Teacher Norm (autumn 2018), with a higher teacher-student ratio and more teachers in the class as the new everyday life of Norwegian elementary school classrooms, adds relevance to the Seaside case. As a result, our sample of class rooms with two teachers in L1 lessons became far more representative of Norwegian classrooms in general. The municipality is a meaningful organizational context binding the separate schools and classrooms into an embedded case. In Norway, it is at the level of the municipality (school owner) that decisions are made, such as for example participation in various school-based competence programs or decisions concerning students' learning resources.
Seaside is a medium size rural municipality in strong growth (www.ssb.no), including a total of nine primary schools. Sixteen per cent of the population are immigrants (compared to fourteen per cent on the national level; annual report from Seaside, 2018, www.ssb.no), with Eastern European immigrants being the largest group. The population of the municipality has education levels consistent with average educational attainment in Norway. Seaside is a relatively wealthy municipality, which is reflected in the school environment. In total, this demographic information suggests that our case is well suited to display variations found within relatively privileged Norwegian schools.

Data collection and sources
The Seaside case stretches over two years (Year One and Year Two). Classroom observations constitute the most important data source for the Seaside case. We also interview teachers and school leaders.
Observational data During Year One (2016/2017), the team of researchers spent time observing a total of 26 lessons in Seaside's six intervention classrooms (see Table 2, below). Year One constituted an exploratory stage of the Seaside case, with aims to generate hypotheses, understand life in classrooms with two teachers, and develop tools for the case study.
The observations were performed towards the end of the autumn and spring term, and the data produced consisted of field notes, as well as narrative summaries calling attention to aspects of organization, language exposure and more generally 'pedagogical opportunity spaces'. The field notes were written in a table format (see Appendix 3). This was based on an ambition to grasp the workflow intuitively by moving to a new row for each activity shift (or new literacy event) and also indicating the time. Naturally occurring conversations with teachers and students are also referred to in the field notes.
During Year Two (2017-2018, in order to better capture life in the classrooms, the team of researchers spent time observing one full week in each of the six intervention classes. The week is an important unity, especially since the main teacher teaches almost all subjects in Norwegian primary school. What happens in the L1 classroom is therefore connected to other subjects and different events during the day and the week. *) In two of the classes, there were more than 8 L1 Norwegian lessons during the week we observed, though not with 2 teachers present. These were observed, but not filmed. We did not observe gymnastics, excursions and outdoor school, nor, generally, art and crafts and music.
Field notes (see example in Appendix 3) were made from all the different subjects (see Table 2, above). As for Year One, the field notes were written in a table format. In addition to running notes, we registered, in the left margin and for each activity, whether the two teachers were both in the same room, or whether they divided the class between them (relevant for L1 lessons, but sometimes also for other lessons); organization of classroom activities (individual, pair, group, plenary, station); and what type of activity (reading, writing, guided reading, guided writing, student talk). Narrative summaries (see example in Appendix 4) were written for each day. In addition to grasping the school day and its lessons as a whole, these focused on teacher co-operation (such as hierarchy, integration, sharing of workload, signs of common cooperation); oracy (both students and teachers: such as response, follow-ups, challenges, types of questions); reading activities taking place (such as teacher's reading for the class, students' own reading, going through reading lesson etc); writing activities taking place (such as fill-in tasks; letter formation practice, individual text writing), and digital technology being used (type of technology, use of technology, organization, practical challenges).
Filmed observations of all L1-lessons in each of the six classes (a total of 47 lessons, à 45 minutes) were also carried out (see Table 2). Due to the holistic focus of the Seaside case, our filming approach has been the same, with filming of whole lessons and both classrooms and group rooms-as opposed to more focused filming of extracts/segments of lessons, based on more targeted research questions. We have recorded sound from two cameras and from each of the teachers. One wide-angle camera (ZoomQ8) was placed in the back corner of the main classroom, and captured the whole class. An additional camera (ZoomQ4) was placed in group rooms/ where the teacher took groups of students. Both teachers wore wireless microphones (Sennheiser AVX-ME2, consisting of lapel mike ME2, pocket transmitter SK AVX and receiver EKP AVX). Together, the equipment captured both classroom and group room sound, as well as teacher-students' interactions and conversations.

Interview data During Year One we conducted semi-structured interviews:
-with the six teacher pairs. The themes of the interviews were cooperation in planning, teaching, evaluation; adapted education with two teachers; the teachers' experiences with being two teachers in the L1 literacy education; obstacles; and the teachers' possible use of the Internet-based program for professional development in literacy instruction ('Language Tracks').
-with the six headmasters. The themes of the interviews were the headmaster's role in making the most out of two teachers/positive effect; possible obstacles in school or for the two teachers; possible changes in school culture due to the Two Teachers project; any guidance on the teachers' unrestrained time; and possible organizational problems involved with assigning two teachers to a class.
(It is important to note that the Year One interviews were based on preliminary hypotheses, and do not cover all aspects of interest of the case study as it subsequently developed.) During the extensive observations in Year Two, field conversations with the teachers involved occurred over the course of the day and the week. Typically, these transpired when students were working individually, between lessons on the way to and from the classroom, and in the lunch breaks at the staff room. These conversations were not systematically audio recorded beyond that some of them took place while the teacher was carrying the microphone (audio recording device), but they are referred and reflected on in field notes and narrative summaries. Finally, in autumn in Year Five we will invite all teachers and their school leaders to a seminar. At this point, we will present some of the findings from the Seaside case, share and validate our findings and get the teachers' and school leaders' reflections and comments on perspectives on classroom practice and retrospective reflections on the effects of increased teacher density.

Researcher positions
In both Year One and Year Two, the researchers divided the schools between them, in order to create confidence and to get acquainted with the teachers and their ways of working. When it was natural, we responded to situations that arose (conversations with teachers or interactions with students), otherwise and most of the time, we remained calm, in the back of the classroom. Our participation thus varied a little from classroom to classroom.
The interviews during Year One were conducted after the observation period, and by the researcher that had spent time in the class and who knew the teachers. The interviews with the school leaders were all conducted by the same researcher, after the observation period.
Methods for analyses Analytical procedures are conducted within a shared project file in NVivo for Teams, containing both fieldnotes, narrative summaries, video recordings from classrooms and group rooms, as well as transcriptions of all recordings. The data is coded in order to reduce the complexity of 131 hours of classroom activity, moving from overarching, descriptive coding towards an interpretive stance that allows us to develop and apply more interpretive codes to limited parts of the material. To date, we coded whole sequences associated with a set of specific literacy events (Table 3, type of code 1). All observational data types are coded for organizational forms (Table 3, type of code 3) and teacher collaboration (Table 3, type of code 2). In transcriptions, all utterances were ascribed to speakers), allowing a detailed overview of the distribution of utterances and speech time (Table 3, type of code 4) during classroom activities in the L1 literacy lesson.
Whole class teaching is further coded for types of talk (Table 3, type of code 5) based on the work of Alexander (2001Alexander ( , 2008. In Alexander's (2001) comparative studies of classroom interaction, he found a basic repertoire of three types of teaching talk (rote, recitation, instruction). Less frequent, but still universally, he found that teachers make use of discussion and dialogue (Alexander, 2008). We have added to and reorganized this typology in order to resonate with our empirical basis and also our key interest in eligibility conditions for participation (Skaftun & Wagner, 2019). Our modified list of categories is organized as a continuum from teacher domination on the one hand side (teacher instruction) to potential student domination on the other (narrative sharing is added to the list) with recitation as intermediary. We have also added dialogue between teachers as a category. Rote does not apply to the classroom practices observed, but reading aloud and singing are particular ways of using voice and mind that we have tagged as formalised talk. Finally, Alexander's two categories, discussion and dialogue, are merged into one category for dialogic potential, tagged conversation. The coding procedure implies closing in on this dialogic potential.
All coding is done by researchers working in pairs in order to support reliability, and uncertainties are solved through inter-rater negotiations. The primary purpose of the coding procedure is to make the database searchable by categories and by cross-referencing the categories, allowing us to narrow the scope to specific phenomena, which will be subjected to in-depth qualitative analysis and interpretations Conversation (teacher and students)

Dialogue between teachers
Instruction (teacher dominance) Alexander, 2001Alexander, , 2008 in separate articles (see below). Making the events visible and providing contextual evidence from the data will be our primary way of ensuring valid and reliable interpretations of what goes on in specific events and in specific classrooms. All analysis will be performed with reference to and in fidelity to the framework provided in this protocol.

Dissemination
The research questions will be elucidated in various scientific articles covering the following themes: -The use of guided reading (RQ 1): Guided reading is a widely used approach to early reading education that has become a frequent practice in Norwegian classrooms. In this article we will explore how teachers exploit the potential of guided reading practices and how different aspects of literacy instruction are integrated. -The practice and pedagogical use of homework (RQ 1): Homework -and reading lessons in particular -constitute an important part of the L1 literacy practice. In this article we will explore the practice of homework with a particular focus on how it is used as a pedagogical tool in L1 literacy education. -Circle time as an opportunity space for dialogic literacy (RQ 1, 3): Circle time, as a variant of whole class teaching, represents a more intimate space for interaction and as such a potentially productive dialogic space. In this article we will explore which literacy practices occur in circle time with a particular interest in narrative sharing. -Whole class conversation about texts (RQ 1): Discussing texts is an essential part of L1 literacy. In this article whole class discussion about texts with conversational qualities will be analysed, with a particular focus on the pedagogical purpose and underlying conceptions of text. -Teacher collaboration in co-taught classrooms (RQ 2): Two teachers in class represents new opportunities as well as some challenges concerning ways to share professional responsibility and professional roles. In this article we will analyse teacher collaboration as it transpires in time and space as a basis for discussing how the additional teacher resource affects practice. -Dialogic space in whole class interaction (RQ 3): Whole class teaching takes up a considerable amount of classroom time, and it provides the most direct insight into the eligibility conditions for student participation. A study based on more limited data from Year One serves as a pilot for a more in-depth study of all the Year Two data by focusing on the conditions for student voices. -Questions in whole class interaction (RQ 3, 1): Questions are a well-known feature of whole class teaching and associated with instructional quality. In this article we will investigate the distribution and qualitative aspects of questions during whole class teaching, with a particular interest in student initiatives and sequences that display conversational qualities.
Literacy practices in co-taught early years classrooms

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The research questions will also be answered more holistically in an Open Access book presented as a case report, where the three overarching research questions provide the structure for the book framed by an introductory chapter with an overall reflection of results and experiences.

Ethical considerations
Written and informed participation consents from teachers and the parents of the students have been obtained as part of the Two Teachers RCT, in accordance with the ethics guidelines of the Norwegian Centre for Research Data (NSD), a thirdparty ethical oversight agency in Norway. In addition, the teachers participating in the Seaside case have approved the (filmed) observations of their class. The teachers were informed that the researchers wished to observe aspects of teacher cooperation and literacy practices. In a few cases, where students did not have written consent from parents for participation in the RCT, we collected consents for participation in the classroom observations of the Seaside case, also in accordance with NSD. The project follows the Ethical guidelines of NSD, as well as the guidelines developed by the National Committee for Research Ethics in the Social Sciences and Humanities (NESH). All data are stored securely and only accessible by the research group and authorized personnel. Access for site investigators requires a formal request (describing plans) approved by the chief investigators. Filmed observations will be deleted in 2023. The researchers will ensure that the participants' anonymity is maintained. All classes will be referred to by class/school number only, and teachers' and students' names will be anonymized.

Limitations
There are limitations to our case study, concerning both quality and amount of data. First, we do not have any systematic information on how the teachers experienced having researchers observing and filming their lessons for a whole week, and how this might have impacted the teaching. The Hawthorne effect, in other words, the tendency for people to change their behaviour simply as a result of being observed, is well documented by social scientists (Salkind, 2010). The embedded nature of our work (the same researcher remained within the same class) can attenuate, but not completely erase this phenomenon. Second, even if we had teachers' selfreports on how they planned the lessons together (see Appendix 1), we do not have any qualitative information on this, only on how the collaboration took place in the classrooms. The intention and the operationalization of their co-teaching may not have been fully consistent. Also, qualitative interviews with teachers and school leaders (on experiences of being two teachers, adapted education, obstacles and challenges at the school level etc.) took place only in Year One. Again, we do however have their yearly self-reports, which provide similar information, but with There are limitations also to our ethnographic approach trusting fieldnotes and narratives written by different researchers. This uncertainty is balanced by access to video files from the L1 lessons, and active checking across the different data types. The initial analytical procedures are mainly based on descriptive codes, but borderline cases calling for interpretation are an unavoidable part of the game, adding an element of uncertainty to the aggregated results based on the coding. Most vulnerable is the coding of types of talk in whole class teaching, and particularly the category conversation, containing dialogic potential beyond the brief exchanges characteristic of recitation. The uncertainty is countered by coding communities (researcher pairs) reaching agreement through discussion. Our primary concern in coding types of talk has been not to overlook dialogic qualities in the data reduction. These dialogic qualities are essential to our interest in student participation in the overall Seaside case, and they are subjected to close reading in different sub-studies.
The example below shows one of seven events, occurring between 9.21 and 9.41. Only one student is in the group room with T2. Inside the classroom, T1 makes sure that students with headphones are not just sitting with the same game.
It seems to me that these are low performing students.
This is a going through the new reading lessons (guided reading).
Very fine session.
One second language student. What are the choices for selecting students for group sessions? Will there be it be an equal distribution over the week? (This is the first lesson, Monday.) I asked the teachers about this afterwards: They divide the students into 4 groups by level. In this lesson, the two lowest performing groups were taken out. The teachers say that they work with all 4 groups, but if there is little time, they will at least take out the two lowest performing. The collaboration between T1 and T2 is very smooth. T1 is the clear classroom teacher. She manages the work in a circle (Norwegian lessons seem to begin with a gathering in circle), even though T2 also participates (and sometimes leads parts), and T1 is always the one staying in the classroom/whole group when there is individual work (as there is a lot of in this class), while T2 is always the one who takes out small groups (3-4 students) in the group room (which is inside the classroom itself [with door always open]). Although T1 is the clear classroom teacher and T2 largely takes care of small groups, I still feel that they have an equal "status" and that they have equally important contributions and are equally respected by the students.

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There is little waiting in this classroom. Students seem to know exactly what to do and get started right away. Everything seems very well organized -well planned in advance (but I did not get the opportunity to discuss this with the teachers). There is more talk in the lessons than I observed during Year One.
Teachers ask a lot of questions (in plenary, circle), organize question rounds (short answers from each student), they spend a lot of time in circle (the teacher talks a lot then), they sing some songs (but these are always the same, simple songs -which seem to have a disciplinary function rather than a language learning/cultural function). The religion lesson is also very oral, but it is primarily the teacher who speaks -the students are extras in the almost wordless dramatization of The Good Samaritan. They also do oral assignments, though usually with one-word answers from the students ("April").
Little conversation. No conversations in group/pair.
The exception is the guided reading session with T2, here there is a little more conversation.
Reading activities taking place -Teacher's reading for the class -Students' own reading -Going through reading lesson -… T2 does guided reading with the groups she takes out in the group room.
There is a little loud reading from the teacher (single words), and the students repeat in chorus, but there is no loud reading of coherent text.
Loud reading of homework is done once (when T2 takes out two groups).
These were the two lowest performing groups.
Otherwise there is mostly writing (Norwegian + a little in Maths) during individual seat work, little focus on reading this day (no reading of coherent text/of small books).
Writing activities taking place -fill-in tasks -letter formation practice -individual text writing -… There is writing during individual seat work, in Norwegian lessons.
Booklets. (And a bit also in Maths.) They write in small home-made books (which they also draw and colour to make nicely presented). The students have made many such books, about different themes (see the field notes). They seem to write a lot -in many subjects. This day, they wrote sentences based on mind maps they made together in a circle, and they wrote answers to questions.
There is no free writing or personal stories this day. No letter formation practice. Digital technology is used in Norwegian (+ eating) this day.
The Smart board is used a lot, both during dead time (for word reading when students enter the classroom in the morning), during eating, but also during lessons -to demonstrate e.g. Chromebook login for everyone).
They often do tasks on Chromebooks -this is often the last task, a kind of reward for having reached through the list of reading/writing tasks.
No use of tablets.
They use available textbook-related Internet resources.
Classroom collection with Chromebooks on trolley that the teachers roll in and out of the classroom. There was one practical challenge with a Smart board that didn't work (for a short while), otherwise everything worked.