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Scientific reasoning (SR) skills and nature of science (NOS) beliefs represent important characteristics of biology teachers' professional competence. In particular, teacher education at university is formative for the professionalization of future teachers and is thus the focus of the current study. Our study aimed to examine the development of SR skills and NOS beliefs and their mutual relationship during teacher education. We applied paper-and-pencil tests to measure SR skills and NOS beliefs of 299 preservice biology teachers from 25 universities in Germany. The results of linear mixed models and planned comparisons revealed that both SR skills and NOS beliefs develop over the course of the study. Nevertheless, the development of SR skills and multiple aspects of NOS beliefs proceeds in different trajectories. Cross-lagged models showed a complex picture concerning the mutual relationship between SR skills and NOS beliefs during their development (both positive and negative). The current study contributes to the existing research because it is based on longitudinal data and allows--in contrast to cross-sectional research--conclusions about the development of SR skills and NOS beliefs.

The teaching process is well described as an interaction between teacher, student, and content. Thus, it seems obvious that teachers must know the content to help students to learn it. Instruments have been developed to measure teachers' content knowledge (CK) in biology, but few of them have been provided to the scientific community. Furthermore, most of them have a topic-specific approach, so there is a need for a more comprehensive measure. In efforts to meet this need we have developed an instrument called the CK in biology inventory (CK-IBI), which has a broader scope than previously published instruments and covers knowledge of five biological disciplines (i.e., ecology, evolution, genetics and microbiology, morphology, and physiology). More than 700 pre-service biology teachers were enrolled to participate in tests to assess the instrument's objectivity, reliability, and validity in two cross-sectional evaluations. Item and scale analyses as well as validity checks indicate that the final version of the CK-IBI (37 items; Cronbach's a = 0.83) can be scored objectively, is unidimensional, reliable, and validly measures pre-service biology teachers' CK. As the instrument was used in a German context, it has been translated into English to enable its scrutiny and use by international communities.

In order to educate scientifically literate children, teachers are required to include nature of science (NOS) in their classroom practice. However, as biology teachers' own understanding of NOS is limited, promoting an initial understanding of NOS in teacher education is crucial. The aim of this study is to elucidate the importance of the first phase of teacher education for biology teachers' understanding of NOS. More precisely, the study aims to examine the relationship between institutional determinants (e.g., the type of teacher education programme) and learning opportunities for pre-service biology teachers' understanding of NOS. Pre-service biology teachers (N = 232) participated in a cross-sectional testing. The corresponding descriptions of N = 649 modules of biology teacher education from 20 German universities were analysed. Qualitative and quantitative methods were applied to relate the institutional determinants and the individual amount of learning opportunities to pre-service biology teachers' understanding of NOS. Results reveal that both institutional determinants as well as the amount of learning opportunities are related to pre-service biology teachers' understanding of NOS. This indicates that teacher education at university represents an important phase for biology teachers' understanding of NOS. The results are discussed in terms of consequences for further research and teacher education.

Teachers make a difference for the outcome of their students in science classrooms. One focus in this context lies on teachers' professional knowledge. We describe this knowledge according to three domains, namely (1) content knowledge (CK), (2) pedagogical content knowledge (PCK), and (3) curricular knowledge (CuK). We hypothesise a positive relationship between these three domains and students' performance in science. Students' science performance was conceptualised by "system thinking" performance in the context of biology teaching. In order to test our hypothesis, we examined the relationship between the knowledge triplet CK, PCK, and CuK and students' performance. 48 biology teachers and their students (N = 1036) participated in this study. Teachers' content-related professional knowledge and students' performance were measured by paper-and-pencil tests. Moreover, we used concept maps to further assess students' performance. By specifying doubly latent models, we found a significant positive relationship between biology teachers' PCK and students' performance. On the contrary, the results reveal no relationship between CK and CuK and students' performance. These findings are discussed in respect to modelling the interrelationship of teachers' content-related professional knowledge and students' learning in science, as well as concerning their relevance for further research and teacher education programmes.

Teachers' content-related knowledge is a key factor influencing the learning progress of students. Different models of content-related knowledge have been proposed by educational researchers; most of them take into account three categories: content knowledge, pedagogical content knowledge, and curricular knowledge. As there is no consensus about the empirical separability (i.e. empirical structure) of content-related knowledge yet, a total of 134 biology teachers from secondary schools completed three tests which were to capture each of the three categories of content-related knowledge. The empirical structure of content-related knowledge was analyzed by Rasch analysis, which suggests content-related knowledge to be composed of (1) content knowledge, (2) pedagogical content knowledge, and (3) curricular knowledge. Pedagogical content knowledge and curricular knowledge are highly related (r[subscript latent]?=?0.70). The latent correlations between content knowledge and pedagogical content knowledge (r[subscript latent] =?0.48)--and curricular knowledge, respectively (r[subscript latent]?=?0.35)--are moderate to low (all ps?

Cross-sectional studies have revealed the importance of university teacher education for science teachers' professional knowledge. However, a detailed understanding of the development of this knowledge is lacking. Our analysis addresses this gap by applying longitudinal models to elucidate how preservice science teachers' content knowledge (CK) and pedagogical content knowledge (PCK) evolve. Our results revealed a nonlinear growth for CK and PCK. We found that both interact during their development and that this interaction changes over the course of teacher education. Also, individual (grade point average) and institutional (teacher education program, second science subject) factors are related to their development. • Content knowledge and pedagogical content knowledge evolve during university teacher education. • Content knowledge and pedagogical content knowledge interact during their development. • Grade point average, teacher education program and second science subject are related to the development. [ABSTRACT FROM AUTHOR]

In the original version, the regression weight ( I B i = -0.22) was assigned to the cross-lagged path between scientific methods (MET) at semester 3 and scientific reasoning (SR) skills at semester 5. In the correct version, the regression weight ( I B i = -0.22) is assigned to the cross-lagged path between SR skills at semester 3 and MET at semester 5. In the original version of the paper [[1]], a regression weight was assigned to the wrong cross-lagged path in Figure 1 (bottom). [Extracted from the article]