Collective teacher culture: exploring an elusive construct and its relations with teacher autonomy, belonging, and job satisfaction

One purpose of this study was to analyze relations between four possible indicators of a collective teacher culture by means of confirmatory factor analyses. The indicators were termed “shared goals values”, “value consonance”, “collective teacher efficacy”, and “supportive colleagues”. A second purpose was to explore relations between collective teacher culture and teachers’ experiences of autonomy, belonging, and job satisfaction. Participants were 760 Norwegian teachers in elementary school and middle school. The data were analyzed by means of confirmatory factor analyses and SEM analyses. The correlations between the four indicators of a collective culture ranged from .44 to .63 and both a model with first order factors and a model with a second order collective culture variable had good fit to the data. The analysis showed that a second order collective teacher culture variable was strongly and positively associated with the teachers’ experiences of autonomy, belonging, and job satisfaction.


Introduction
The social environment at school has important implications for teacher motivation and well-being, for instance by influencing how teachers interact with each other (Moller et al., 2013;Vescio et al., 2008). Several studies reveal that positive and supportive social relations between the teachers and between the teachers and the school administration are associated with job-satisfaction, engagement, and the feeling of belonging (Hakanen et al., 2006;Simbula et al., 2011;Skaalvik & Skaalvik, 2011a. Because teachers' motivation and well-being may affect their instruction, social relations between schoolteachers and between teachers and school administration may also bear consequences for student learning. The quality of the social interactions between the teachers may also influence the teachers' abilities and willingness to work together, and therefore their experiences of succeeding through joint effort. Such experiences are important requirements for the development of collective teacher efficacy (Bandura, 1997). Previous research confirms that positive and supportive social relations among the teachers as well as between the teachers and the school administration are associated with collective teacher efficacy (Lee et al., 2011;Skaalvik & Skaalvik, 2019). The belief that one may succeed through joint effort may in turn increase the quality of the social interactions in the teaching staff. Thus, a positive and supportive social environment at school and collective teacher efficacy likely influence each other in a reciprocal manner. Previous research also indicates that teachers' experiences of the social environment as inclusive and supportive correlate strongly with the perception that they share educational goals and values with their colleagues and with the school administration (Skaalvik & Skaalvik, 2011a, 2011b. Also, research indicates that instructional leadership emphasizing common goals and values increases collective teacher efficacy (Cansoy et al., 2020).
Taken together, previous research indicates that teacher motivation and wellbeing as well as teacher collaboration are influenced by positive and supportive work-related social relations, beliefs in what teachers may achieve through collaboration (collective teacher efficacy), and the development of common educational goals and values. We suggest that positive social relations, supportive environment, collective teacher efficacy, and common goals and values are interrelated constructs, and that they may constitute what we term a collective teacher culture. Campoli (2017) offer a similar concept of a professional school culture. A professional school culture is often defined by teacher collaboration, the sharing of knowledge and experiences, and systematically using data and experiences to improve the educational practice (Schipper et al., 2020). Because cooperation in teacher teams has become mandatory and scheduled in many Norwegian schools (Skaalvik & Skaalvik, 2021), we did not include teacher cooperation in the collective teacher culture construct. Successful teacher collaboration may be dependent on common values, positive and supportive social relations, and beliefs in what teachers may achieve through collaboration (collective teacher efficacy). Previous research shows that when cooperation is mandatory and scheduled, it may not be a good indication of positive relations, social support, or agreement on goals and values (Skaalvik & Skaalvik, 2015, 2021. Teachers report that the meetings are used both for rough planning of the teaching and for discussing common educational issues and problems. The teachers also report quite different experiences with the collaboration, from well-functioning teams to teams that are described as dysfunctional (Charner-Laird, 2017;Skaalvik & Skaalvik, 2021). In an interview study of Norwegian teachers, Skaalvik and Skaalvik (2021) found dysfunctional teamwork to be a source of stress and a serious job demand.
In this study we conceptualized a collective teacher culture as one characterized by a common understanding of educational goals and values, a strong collective teacher efficacy, and positive and supportive social relations. This is a broader conceptualization than the one Skaalvik and Skaalvik offered in 2018, emphasizing shared values and common practices. It is also broader than the description of a "collective pedagogical teacher culture" given by Moller et al. (2013). These researchers described a collective pedagogical teacher culture as an environment where teachers perceive a strong community orientation which include teacher agreement on the school mission. However, our emphasis on common educational goals and values overlap agreement on the school mission. Our conceptualization of a collective teacher culture also differs from what Campoli (2017) terms "a culture of teacher collegiality" which includes common beliefs and values, teacher cooperation, and enforcing common rules of student behavior. As noted, we did not include teacher cooperation.
The purpose of the present study was to explore intercorrelations between measures of common goals and values, collective teacher efficacy, and positive and supportive social relations. Another purpose was, by means of confirmatory factor analysis, to test a model where common goals and values, collective teacher efficacy, and supportive social relations are indicators of a second order collective teacher culture. A third purpose was to explore relations between a collective teacher culture and teachers feeling of belonging, job satisfaction, and perceived autonomy.

Collective teacher culture
In this study, we analyzed four potential aspects or indicators of a collective teacher culture: (a) shared goals and values in the teacher staff and between teachers and the school administration, (b) perceived value consonance, (c) collective teacher efficacy, and (d) a supportive relation with colleagues. We distinguished between two overlapping categories of common goals: shared goals and values and value consonance (see below). We did not include collaboration because much collaboration among teachers is driven by administrative mandate rather than teacher initiative (Hargreaves, 1994;Skaalvik & Skaalvik, 2021) and may not always indicate a collective culture. Rather, in our conceptualization, a collective teacher culture is a prerequisite for rewarding teacher cooperation.

Shared goals and values
We perceive shared goals and values as an important aspect of a collective teacher culture. According to Hoy and Miskel (2008), the development of shared values binds the teachers together and gives the school a distinctive identity. Shared values are also perceived as an important prerequisite for adaptive teacher collaboration. For instance, Thomson and Perry (2006) argue that collaboration requires trusting relationships among willing partners (see also Montiel-Overall, 2005). In a study of Norwegian teachers, Skaalvik and Skaalvik (2018) found that the perception of shared values among the teachers correlated positively with job satisfaction and negatively with symptoms of burnout and motivation to leave the teaching profession.
In this study shared goals and values was measured as the individual teachers' perception that the teachers at the school and the school administration had common educational goals and values, but with no reference to the individual teacher's personal values.

Perceived value consonance
Skaalvik and Skaalvik (2011a) defined perceive value consonance as "the degree to which teachers feel that they share the prevailing norms and values at the school where they are teaching, for instance what goals should be pursued, what content should be emphasized, and what educational means and methods should be used" (p. 1031). The construct of value consonance overlaps with what we have termed shared values. However, whereas value consonance focuses on the individual teacher and whether this teacher shares the prevailing goals and values at the school, shared values describe the degree to which there is a common understanding of educational goals and values in the teacher collegium and between the teachers and the school administration. That these constructs are separate but overlapping is previously shown by a moderate correlation of 0.58 (Skaalvik & Skaalvik, 2018). In a school with a high degree of shared values in the teacher staff, there may still be teachers who feel that the prevailing values in the teacher staff are not compatible with their personal values. These teachers may perceive that there is a high degree of shared goals and values among most teachers at school, but that they personally do not share these goals and values, which we conceptualize as lack of value consonance.
In a series of studies, Skaalvik and Skaalvik showed that teachers' perceptions of value consonance were positively associated with their teaching self-efficacy, engagement, feeling of belonging, and job satisfaction, whereas it was negatively associated with teacher burnout and teacher's motivation to leave the teaching profession (Skaalvik & Skaalvik, 2011a, 2017a. A possible explanation of these findings is that a teacher who feels that the prevailing norms and values at the school is compatible with his or her personal values may experience what Rosenberg (1979) referred to as contextual consonance. According to Rosenberg, a lack of contextual consonance or a contextual dissonance may result in a feeling of not belonging. Bandura (1997) defines self-efficacy as beliefs about one's own ability to organize and execute the courses of action required to attain given educational goals. Accordingly, teacher self-efficacy may be conceptualized as teachers' beliefs in their own abilities to plan, organize, and carry out activities required to attain given educational goals (Skaalvik & Skaalvik, 2007). However, many challenges require that people work together. Bandura (1997) therefore emphasizes the importance of developing collective teacher efficacy, which he defines as beliefs that people, for instance 1 3

Perceived collective teacher efficacy
Collective teacher culture: exploring an elusive construct… teachers, can succeed through their collective efforts. The most powerful source of collective efficacy is mastery experiences (Adams & Forsyth, 2006;Goddard et al., 2004). Skaalvik and Skaalvik (2019) therefore suggest that mastery experiences that result from collaboration and joint effort are particularly suited for increasing collective efficacy beliefs. However, we suggest that common goals and values among the staff as well as individual teachers' feeling of value consonance are prerequisites for both successful collaboration and for developing collective efficacy. Thus, there is likely reciprocal relations between shared values, perceived value consonance, and perceived collective efficacy. We suggest that these variables therefore are particularly well suited as indicators of a collective teacher culture.

Supportive relations with colleagues
We also conceptualize positive and supportive social relations with colleagues as one aspect of a collective culture. Positive social relations may be seen both as a prerequisite and as an outcome of shared values and adaptive collaboration. According to Waddell (2010) colleagues can be a source of strength in the teaching profession and Geisler et al. (2019) argue that job resources in terms of a supportive environment is an important determinant of job satisfaction and organizational commitment. Research related to the Job Demands-Resources model developed by Demerouti et al. (2001) has consistently shown that positive and supportive social relations at work is associated with engagement, the feeling of belonging, collective teacher efficacy, and job satisfaction, and negatively associated with burnout (e.g., Hakanen et al., 2006;Leung & Lee, 2006;Pines & Aronson, 1988;Simbula et al., 2011;Skaalvik & Skaalvik, 2011a, 2017a.

Teacher autonomy
In self-determination theory, autonomy is regarded as a basic psychological need (Deci & Ryan, 1985, 2000. In support of this assumption, empirical research shows that teachers' perceptions of autonomy are associated with job satisfaction (Pearson & Moomaw, 2006;Skaalvik & Skaalvik, 2010, 2015Zembylas & Papanastasiou, 2006). An important task for the present study, was to explore relations between a collective teacher culture and teachers' perceptions of autonomy. Because a collective culture is characterized by value consonance, social support, and collective efficacy one may expect that teachers in such an environment would experience a high degree of autonomy. Nevertheless, a collective culture may also be characterized by joint decisions and expectations, and for some teachers, such expectations may diminish their experience of autonomy.

Feeling of belonging
Psychological researchers generally consider the need to belong as a fundamental human motivation (Baumeister & Leary, 1995;Deci & Ryan, 2000). The degree to which the need to belong is accommodated, for instance at the workplace, may affect motivation and commitment as well as well-being. Research on students repeatedly show that the feeling of belonging to the school or the school class correlates positively both with motivation for schoolwork (Furrer & Skinner, 2003;Goodenow & Grady, 1993) and with positive affect (McMahon et al., 2008). Skaalvik (2011a, 2011b) also found that teachers' feeling of belonging at the school where they were teaching were associated with higher levels of job satisfaction and lower levels of emotional exhaustion. Roeser et al. (1996) conceptualize belonging as a feeling of relatedness and of being valued. Similarly, Goodenow and Grady (1993) describe a sense of belonging as resulting from a feeling of being accepted, respected, and receiving social support from other members of the community. We therefore expected a positive association between teachers' perceptions of a collective teacher culture at the school where they were teaching and their feeling of belonging. Supporting this expectation, previous research reveals a moderate to strong association between value consonance and teachers' feeling of belonging (Skaalvik & Skaalvik, 2011b.

Job satisfaction
General job satisfaction is commonly defined as positive or negative evaluative judgments that people make regarding their work (Weiss, 1999). This definition is based on a conceptualization of job satisfaction as a pleasurable or positive emotional state resulting from the appraisal of one's job (Locke, 1976). Similarly, Author (2010) defined teacher job satisfaction as teachers' affective reactions to their work and their teaching role. Previous research shows that teacher job satisfaction is predictive of teachers' motivation to continue in the teaching profession (Skaalvik & Skaalvik, 2017a).
General job satisfaction should be distinguished from satisfaction with specific aspects of the job, for instance working hours, work tasks, or social climate (Geisler et al., 2019;Skaalvik & Skaalvik, 2011a). However, satisfaction with different aspects of the job may influence general job satisfaction. Because of the need to belong, we expected that a collective teacher culture would be positively associated with job satisfaction.

The present study
The present study had several purposes. One purpose was to explore correlations between four possible indicators of a collective teacher culture: shared values, value consonance, collective teacher efficacy, and supportive relations with colleagues. Another purpose was to test a SEM model with shared values, value consonance, collective teacher efficacy, and supportive relations with colleagues as indicators of a second order collective teacher culture factor. A third purpose was to explore relations between indicators of a collective teacher culture and teachers' perceptions of autonomy, belonging, and job satisfaction.

Participants and procedure
The participants in this study were 760 Norwegian teachers in elementary school (grade 1-7) and middle school (grade 8-10). The study was part of a larger survey. Twenty-two schools were drawn at random from three counties in central Norway, and all teachers in these schools were invited to participate. Eighty-one percent of the teachers at the selected schools participated in the study. The teachers were informed that participation was voluntary. A particular period of time during working hours was set aside for all teachers to fill out the questionnaire at the same time. When the questionnaires were filled out, they were put in envelopes and sealed on the spot to assure the teachers that they were anonymous. Sixty-nine percent of the participants were women. The participants' ages ranged from 23 to 68 years with a mean of 44 years, and their experience as teachers ranged from 1 to 47 years with a mean of 15 years.

Shared goals and values
Shared goals and values were in this study defined as individual teachers' perception that the teachers at the school and the school administration had common educational goals and values, but with no reference to the individual teacher's personal values. It was measured by means of a previously tested three-item scale (Skaalvik & Skaalvik, 2017a, 2017b. The items were: ''The teachers and the school administration at this school have a common understanding of the direction in which the school should be developed'', ''The teachers at this school have a shared perception of goals and means of the school development'', and ''The teachers at this school practice a common set of norms and rules''. Responses were given on a 6-point scale from "Completely disagree" (1) to "Completely agree" (6). In the present study, Cronbach's alpha for the scale was 0.84.

Perceived value consonance
Perceived value consonance was defined as the degree to which teachers feel that they personally share the prevailing norms and values at the school where they are teaching. It was measured by means of a previously tested three-item "Value consonance scale" (Skaalvik & Skaalvik, 2011a). The items were: "My educational values are in accordance with the values which are emphasized at this school", "My colleagues and I have the same opinion about what is important in education", and "I feel that this school shares my view of what constitutes good teaching". Responses were given on a 6-point scale from "Completely disagree" (1) to "Completely agree" (6). In the present study, Cronbach's alpha for the scale was 0.81.

Collective teacher efficacy
Collective teacher efficacy was measured by four items from the Perceived Collective Teacher Efficacy scale (Skaalvik & Skaalvik, 2007). The Scale measured collective efficacy related to instruction, motivating students, controlling student behavior, addressing students' needs, and creating a safe environment at school. Examples of items are: "As teachers of this school we can get even the most difficult students engaged in their schoolwork" and "Teachers in this school successfully address individual pupils' needs". Responses were given on a 6-point scale from "Completely disagree" (1) to "Completely agree" (6). Cronbach's alpha for the scale was 0.80.

Supportive relations with colleagues
Supportive relations with colleagues were measured by means of a previously tested three-item scale (Skaalvik & Skaalvik, 2011a). The items were: ''In educational matters, I can always get good help from my colleagues'', ''The relations among the colleagues at this school are characterized by friendliness and a concern for each other'', and ''Teachers at this school help and support each other''. Responses were given on a 6-point scale from "Completely disagree" (1) to "Completely agree" (6). Cronbach's alpha for the scale was 0.73.

Autonomy
Autonomy was in this study limited to the actual teaching and to working with students. It was measured by means of a previously tested three-item teacher autonomy scale (Skaalvik & Skaalvik, 2010). The items were: ''In my daily teaching I am free to choose teaching methods and strategies'', "In the subjects that I teach I feel free to decide what content to focus on", and "I feel that I can influence my working condition". Responses were given on a 6-point scale from "Completely disagree" (1) to "Completely agree" (6). Cronbach's alpha for the scale was 0.89.

Feeling of belonging
Feeling of belonging was measured by means of a previously tested three-item scale (Skaalvik & Skaalvik, 2011a). The items were: "I feel that I belong at this school", "I feel that I am accepted by the leadership at this school", and "I feel that my colleagues

3
Collective teacher culture: exploring an elusive construct… have faith in me". Responses were given on a 6-point scale from "Completely disagree" (1) to "Completely agree" (6). Cronbach's alpha for the scale was 0.79.

Job satisfaction
Job satisfaction was measured by means of a previously tested four-item job satisfaction scale (Skaalvik & Skaalvik, 2011a). The items were: ''I enjoy working as a teacher'', ''I look forward to going to school every day'', ''Working as a teacher is extremely rewarding,'' and ''When I get up in the morning, I look forward to going to work.'' Responses were given on a 6-point scale from "Completely disagree" (1) to "Completely agree" (6). Cronbach's alpha in this study was 0.90.

Data analyses
The data were analysed by means of confirmatory factor analysis, and SEM analysis using the AMOS 25 program. These methods are powerful statistical tools for examining relations between latent variables and take a confirmatory, rather than an exploratory, approach to the data analysis (Byrne, 2001). Theoretical models can be tested statistically to determine the extent to which they are consistent with the data.
We first tested three measurement models by means of confirmatory factor analyses with maximum likelihood estimation of parameters. Model 1 consisted of four correlated first order factors that were considered as aspects of a collective teacher culture (collective teacher efficacy, shared values, value consonance, and supportive colleagues). In model 2, a second order collective teacher culture variable was indicated by the same primary factors as in model 1. The purpose of these analyses was to compare model 1 and 2 and to explore if the four measures of a collective teacher culture may be used as indicators of a second order factor. Model 3 consisted of one second order variable (collective teacher culture) and three primary factors (autonomy, belonging, and job satisfaction). Secondly, we tested a SEM model with a second order collective teacher culture as an exogenous variable and autonomy, belonging, and job satisfaction as endogenous variables.
We used well-established indices of model fit: CFI, IFI, TLI, and RMSEA. For the CFI, IFI, and TLI indices, values greater than 0.90 are considered acceptable, and values greater than 0.95 indicate a good fit to the data (Bollen, 1989;Byrne, 2001;Hu & Bentler, 1999). For well-specified models, an RMSEA of 0.06 or less reflects a good fit (Hu & Bentler, 1999). Missing values were treated based on maximum likelihood estimation in the AMOS program (Byrne, 2001). Compared to both listwise and pairwise deletion of missing data and to mean imputation, maximum likelihood estimation will exhibit the least bias (Little & Rubin, 1989;Muthén et al., 1987;Schafer, 1997).

Zero order correlations
Zero order correlations between the study variables as well as statistical means, standard deviations, and Cronbach's alphas are shown in Table 1. The four indicators of a collective culture correlated between r. = 0.44 and r. = 0.63. All these indicators correlated positively and moderately with autonomy, belonging, and job satisfaction. These correlations ranged from r. = 0.21 to r. = 0.49. Also, autonomy, belonging, and job satisfaction were positively and moderately correlated (r. = 0.24, 0.34, and 0.39).

Confirmatory factor analyses
The next step in the analyses was to test three measurement models by means of confirmatory factor analyses. We first tested Model 1, which had four correlated primary factors (collective teacher efficacy, shared values, perceived value consonance, and supportive relations with colleagues). The model had good fit to the data (χ2 (59, N = 760) = 201,22, p < 0.001, RMSEA = 0.06, IFI = 0.97, CFI = 0.97, TLI = 0.95). All factor loadings were high (standardized regression weights ranging from 0.53 to 0.88). The correlations between the latent variables were moderate to strong, ranging from 0.48 to 0.73 (Table 2). In Model 2, four latent primary factors (collective teacher efficacy, shared values, perceived value consonance, and supportive relations with colleagues) were used as indicators of a second order collective teacher culture variable. The model had good fit to the data (χ2 (61, N = 760) = 257,10, p < 0.001, RMSEA = 0.07, IFI = 0.96, CFI = 0.96, TLI = 0.93). All factor loadings (standardized regression coefficients) were strong and varied from 0.53 to 0.89 (Fig. 1).
The two models were compared using the Chi 2 -difference test (ΔChi 2 ) and difference in CFI (ΔCFI). An absolute difference in CFI higher than 0.01 would indicate a significant difference in model fit. The Chi 2 -difference test indicated that a model with primary factors fitted the data significantly better than a model with second order factors (ΔChi 2 = 55.88, Δdf = 2). However, ΔCFI did not exceed 0.01. The fit indices indicated that both models would be adequate for SEM analysis. However, the strong correlations between the four indicators of a collective teacher culture indicated that a SEM model with collective teacher efficacy, shared values, perceived value consonance, and supportive relations with colleagues as primary factors might represent a collinearity problem. We therefore decided that a collective teacher culture should be represented by a second order factor in the SEM analysis.
Model 3 consisted of a second order collective teacher culture variable and three primary factors (autonomy, belonging and job satisfaction). The second order factor was indicated by collective teacher efficacy, shared values, perceived value consonance, and supportive relations with colleagues. The model had acceptable fit to the data (χ2 (220, N = 760) = 2891,56, p < 0.001, RMSEA = 0.06, IFI = 0.93, CFI = 0.93, TLI = 0.91). The correlations between the latent variables are shown in Table 3. Collective culture was positively and moderately associated with autonomy (r. = 0.47) as well as belonging (r. = 0.55) and job satisfaction (r. = 0.43).

SEM analysis
Based on the measurement models, we conducted a SEM analysis with a second order collective teacher culture as the exogenous variable and autonomy, belonging,  It should be noted that, in the SEM model no paths were included between autonomy, belonging, and job satisfaction. Including paths between these variables increases model fit, but was not done because there are likely reciprocal relations between these variables. The SEM analysis verify that the perception of working in a collective culture is positively related to autonomy (beta = 0.48), belonging (beta = 0.58), and job satisfaction (beta = 0.46).

Discussion and conclusion
One purpose of this study was to explore intercorrelations between four possible indicators of a collective teacher culture (CTC) at school: collective teacher efficacy, shared goals and values, value consonance, and supportive social relations (for definitions of these indicators, see "Theoretical framework" and "Method"). We conducted two confirmatory factor analyses, one specifying four correlated primary factors and one specifying a second order CTC factor. The correlations between the primary factors were moderate to strong and both models had good fit to the data.
The results indicate that measures of collective teacher efficacy, shared goals and values, value consonance, and supportive social relations are interrelated constructs  Fig. 2 Structural model of relations between a second order collective teacher culture and autonomy, belonging, and job satisfaction that are well suited as indicators of a CTC. This is an important finding because teacher research tends to analyze such constructs separately.
Another purpose was to explore relations between a CTC and teachers feeling of belonging, job satisfaction, and perceived autonomy. These relations were tested by means of a SEM model in which CTC was represented by a second order exogenous variable. The analysis showed that a second order CTC factor positively predicted autonomy, belonging and job satisfaction (beta values = 0.48, 0.58, and 0.46, respectively).
The findings are in accordance with previous research exploring collective teacher efficacy, shared goals and values, value consonance, and supportive social relations separately. Previous research reveal that shared values are positively associated with job satisfaction (Skaalvik & Skaalvik, 2017a), that perceived value consonance is positively associated with belonging and job satisfaction (Skaalvik & Skaalvik, b, 2011a, that collective teacher efficacy is positively associated with commitment (Fathi & Rostami, 2018), teacher collaboration (Onsrud, 2015), and individual teacher self-efficacy (Skaalvik, 2007), and that having supportive colleagues is positively associated with belonging (Skaalvik & Skaalvik, 2011a. This study clearly indicates the benefit of a CTC, not only for the teachers' feeling of belonging and job satisfaction, but even for their perceived autonomy (see Fig. 2). If everyone agrees about goals and values, collective decisions and teacher collaboration should not represent much strain, sacrifice, or loss of autonomy for the individual teacher. Instead, it may be a source of belonging and job satisfaction (Waddell, 2010). However, if common values only apply to a group of teachers, and particularly if they apply to a large majority of the teachers at the school, the effect on teachers who do not share the majority values may be negative. These teachers may experience the school environment as a dissonant context, which may result in lower feeling of belonging, lower job satisfaction and less feeling of autonomy. This interpretation is in accordance with previous research using qualitative interview data. Skaalvik (2015, 2021) report that some teachers describe teamwork as a source of enjoyment whereas other teachers talk about it as a source of stress because they do not agree with the majority of teachers.
A practical implication of this study is that the school administration should work to develop a strong collective culture at school. We conceptualize this as a key element of instructional or educational leadership. Our findings imply that important aspects of a CTC include shared values, value consonance, collective efficacy, and supportive collegial relations. Such a culture cannot be dictated, but has to result from discussions and common effort. We believe that the different aspects of a CTC influence each other in a reciprocal manner. For example, experiencing that one can succeed through common effort (collective efficacy) may build trust and willingness to support each other (supportive colleagues), whereas collegial support adds to the willingness to seek common goals and values. In turn, common goals and values increases the motivation for collaboration and increases the quality of the social interactions. As shown in Fig. 2 this may result in positive affect such as the feeling of belonging, job satisfaction, and autonomy.
Development of the school's goals and values is a continuous process because the challenges change and new teachers and principals emerge. Educational goals and values should therefore be discussed continuously at the school as part of the teachers' professional learning. Initiating and leading such discussions is an important responsibility for the school leadership. However, we suggest that, in order to ensure that a CTC is compatible with teachers' experience of autonomy, it is important that common goals and values are not developed into a method compulsion.

Limitations
This study has several limitations. It was designed as a cross-sectional study and causal relations are merely interpretations. Longitudinal studies are important in future research. Although all scales had high reliability, each dimension of a collective culture were measured with three to four items only. Also, we used four indicators of a CTC. Future research should explore other dimensions of a collective culture. In this study we avoided including collaboration as an indicator because in Norwegian schools much collaboration is mandated by the school leadership. Nevertheless, the role of collaboration in a CTC needs to be explored in future research. Also, the assumption that the different aspects of a CTC is interrelated and affects each other in a reciprocal manner, needs to be tested in longitudinal studies.

Conclusions
Shared values, collective teacher efficacy, value consonance, and supportive colleagues constitute a reliable measure of CTC at school. A CTC is associated with positive teacher experiences and emotions, such as perceived autonomy, feeling of belonging, and job satisfaction.
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