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Assessment literacy is a crucial aspect of teachers' professional knowledge and relevant to fostering students' learning. Concerning experimentation, teachers have to be able to assess student achievement when students form hypotheses, design experiments, and analyze data. Therefore, teachers need to be familiar with criteria for experimentation as well as student conceptions of experimentation. The present study modeled and measured 495 German pre-service teachers' knowledge of what to assess regarding experimentation competences in biology. We applied an open-answer format for the measurement instrument. For modeling we used item response theory (IRT). We argue that "knowledge of what to assess" regarding experimentation competences is a one-dimensional construct and we provide evidence for the validity of the measurement. Furthermore, we describe qualitative findings of pre-service teachers' "knowledge of what to assess," in particular difficulties concerning the assessment of student conceptions as well as the use of scientific terms in the assessments. We discuss the findings in terms of implications for science teacher education and further research perspectives.

Teachers' beliefs about science teaching vary greatly. To analyze the relationships between teachers' beliefs and other variables related to teaching and learning, researchers can use the following two options: single item belief models or belief scales. In this study, we compared both models in the context of teachers' beliefs regarding teaching about cancer. Although both models exhibited a good model fit, each approach had both advantages and disadvantages when we judged the modelling approaches in terms of fulfilling the requirements of common psychometric standards and adequately acknowledging the diversity of different beliefs. We discuss the predictive value of both models and their contribution to planning belief-based interventions for cancer education. We argue that researchers should combine the advantages of single item and scale models when analyzing the diversity of teachers' beliefs.

We investigated potential drivers of interest in topic-context and topic-activity combinations, as well as interactions between the different elements of situational interest in evolutionary biology. High school students (n = 982, age 17 years) were asked to rate their interest in two sets of items consisting of topic-context and topic-activity combinations. Rasch modeling, analyses of variance, and descriptive statistics revealed that topics are the dominant dimension and moderate the general level of interest that students express in both topic-context and topic-activity combinations. Qualitative findings from interviews with high school students (n = 6, age 16 years) support this finding. Thus, choice of a particular context, as well as choice of a particular activity, may be less important than previously assumed, since topics are the bottleneck and drive situational interest in topic-context combinations and topic-activity combinations. Implications for evolution education are discussed.

This study investigated factors influencing teachers' intention and willingness to teach about cancer in the context of the theory of planned behaviour. Because teaching about cancer is mandatory in Germany, we compared n=355 teachers' intention to teach about cancer under mandatory conditions and their willingness to teach about cancer if they had free choice. Teachers signalled strong intention and a strong willingness to teach about cancer. Teachers did not perceive teaching about cancer to be a burden and strongly considered it to be necessary. Structural equation modelling showed that perceived autonomy was the only significant predictor of teachers' intention, whereas attitude towards the perceived necessity to teach about cancer, attitude towards the perceived burden of teaching about cancer and social norm were significant predictors of willingness. We attributed these differences to the observation of a ceiling effect for intention but not for willingness. There were systematic differences among the variables predicting teachers' intention and willingness depending on whether the teachers had personal experience with cancer. Indirect measures yielded insights into which teacher beliefs affected the direct measures. We discuss implications for professional development, such as reducing the burden of teaching about cancer by adequately addressing emotionally-charged classroom situations.

This paper reports on findings from an analysis of trait-formation tasks in the genetic sections of high school biology textbooks. Drawing on studies exploring a range of problems in students' explanations of trait formation, we investigated trait-formation tasks and analysed their potential for knowledge integration and multi-level mechanistic reasoning. Among the 216 trait-formation tasks, 39 tasks (18%) were classified as integrative tasks addressing the relationships between genes, proteins and traits. The remaining 177 tasks (82%) were non-integrative tasks addressing selected aspects of the relationship between genes and proteins alone, respectively the relationship between proteins and traits alone. Among the non-integrative tasks, 64% addressed the molecular level alone and thus did not encourage students to address the higher levels of biological organisation. 13% of the non-integrative tasks (n = 23) and 5% of the integrative tasks (n = 2) addressed the role of the environment in trait formation. The findings are related to three main arguments from the genetics literature, concerning knowledge integration and multi-level mechanistic reasoning. As educational implications, we recommend that biology educators make use of integrative tasks to foster students' understanding of trait formation from an integrated model connecting genes, proteins, environmental factors and traits to overcome gene-centred and gene-deterministic beliefs.

Student interest in plants is lacking. Therefore, we investigated potential drivers of situational interest in cultivated plants and interactions between different dimensions of interest, i.e. topic, context and learning activity. A total of 462 high school students (14-17 years of age) rated two sets of questionnaire items combining eight plants (representing topics) either with different contexts or with different activities. We used Rasch analyses and multivariate analyses of variance to investigate which dimension of interest drove the students' interest. Contexts were the dominant dimension of plant-context combinations. Students were most interested in plants in reference to the contexts 'risks and the assessment of risks' and 'impacts on the environment'. Plants were the dominant dimension of plant-activity combinations. Students were most interested in activities in reference to cannabis (psychoactive plant), cocoa (stimulant plant) and arnica (medicinal plant). For these three plants, the least interesting activity ('working with scientific texts') was more interesting than the most interesting activity ('completing a computer simulation') for the other five plants. Plants, thus, moderated the general level of interest students expressed in plant-activity combinations. We discuss the findings in terms of the choices educators can make for contextualizing plants and for selecting plants for classroom activities.

Students often have misconceptions about terrestrial carbon flows and there is a lack of coherence in students' explanations regarding the different levels of biological organisation at which these processes occur. In this study, problem-based teaching materials on the topic of terrestrial carbon flows were developed and tested with 15 students 18-19 years old (grade 12) using a pre/post-test design. Students focused on specific carbon flows in an ecosystem at the macro level (e.g. CO[subscript 2] fixation and heterotrophic respiration) including specific related concepts at the micro level (e.g. photosynthesis and cellular respiration). The findings indicate that the teaching materials improved the students' understanding of terrestrial carbon flows and their ability to reason across the different levels of biological organisation. On the basis of these findings, implications for teaching terrestrial carbon flows in biological education are discussed.

In Germany, science education standards for students at the end of grade nine have been in existance since 2005. Some of these standards are dedicated to scientific inquiry (e.g. experimentation). They describe which abilities learners are expected to possess at the end of grade nine. In the USA, several documents describe standards for "Teaching Inquiry" (NGSS 2013, NRC 1996/2000/2007, AAAS 1989). Presently, comparable teaching standards for science teachers are mostly lacking in Germany. Further, there are hardly any instruments that allow for the assessment of specific competences pertaining to teaching experimental lessons and assessing student competences in experimentation. Therefore, the aim of the project described in this paper is to develop assessment instruments for biology teachers who are being trained at universities as well as in in-service teacher training programs with respect to i) analyzing experimental biology lessons, ii) planning experimental biology lessons, and iii) assessing student achievements in experimental biology lessons. The article gives insights into ongoing research with respect to assessing the quality of biology teacher education. Finally, the developed measurement instruments should allow for assessing the learning preconditions of future biology teachers. The instruments offer first starting points for the development of sensitive measures for longitudinal studies to investigate university teacher education and teacher traineeship in the subject of biology.

This study investigates students' conceptions of the carbon cycle with regard to the components they believe to be relevant to the carbon cycle, how they interrelate these components, the ways in which they trace carbon atoms, and the different levels of biological organisation they consider when doing so. A total of 142 students aged 13-16 years (grades 8-10) participated in the study. A total of 130 students completed the diagnostic task, and an additional 12 students completed both the diagnostic task and were interviewed. The primary results show that the students identified few components of the carbon cycle, tended to trace carbon atoms exclusively at the level of the organism, and had difficulties identifying organic carbon compounds, especially during processes in which carbon compounds are transformed. Considering the main educational implications, we recommend using an instructional strategy that traces carbon atoms across the different levels of biological organisation whilst connecting fragmented knowledge by integrating knowledge from physiology, biochemistry and ecology when teaching the carbon cycle.

The aim of this study is to investigate the relationship between high school students' understanding of carbon compounds, including their transformations, and their ability to trace matter in the carbon cycle. The rationale of this study is based on the hypothesis that the students' lack of knowledge about carbon compounds and their transformations limits the students' ability to trace carbon in the carbon cycle. A total of 16 students aged 14-16 years (grade 9) from two different secondary schools were interviewed about carbon compounds, and they were asked to trace matter in the carbon cycle in response to a written diagnostic task. We argue that students' lack of knowledge about carbon compounds and their transformations is responsible for their construction of the carbon cycle as either a gas-gas or solid-solid cycle. Educational implications are discussed.

This paper presents findings from a quasi-experimental study evaluating future teachers' attitudes and beliefs in response to a cross-curricular university course on evolution and creation bridging biological and Christian theological perspectives. Based on previous findings, we hypothesized that a course providing learning opportunities for epistemic insight within this multidisciplinary arena might have effects on attitudes and beliefs relevant to the field. Hence, the main research question was the following: To what extent do student teachers' attitudes and beliefs change by attending a cross-curricular course on evolution and creation intended to develop student teachers' epistemic insight into the nature of science and into the relationship between science and theology? The answer from this quasi-experimental evaluation study (pre-post-design; test group n = 26, control group n = 24) is as follows: It depends upon the variable investigated! Pre-post-analysis using a repeated measures ANOVA revealed that the cross-curricular course integrating epistemic insight induced changes in creationist beliefs, in students' perception of conflict, and in acceptance of evolution. In contrast, there was no effect on attitudes toward evolutionary theory, on attitudes toward the Biblical accounts of creation, or on scientistic beliefs. However, when student responses were analyzed individually, case-based evidence for belief change in students with scientistic positions emerged. Among the reasons for those different effects, we discuss conceptual differences between attitude and acceptance, features of the student teacher sample, and the particular content of the course explicitly addressing creationism but not scientism. In conclusion, the paper corroborates the role of epistemic insight in the multidisciplinary field of evolution and creation and provides initial evidence that epistemic insight possesses a particular potential concerning positions at both ends of the spectrum.

The teleological bias, a major learning obstacle, involves explaining biological phenomena in terms of purposes and goals. To probe the teleological bias, researchers have used acceptance judgement tasks and preference judgement tasks. In the present study, such tasks were used with German high school students (N = 353) for 10 phenomena from human biology, that were explained both teleologically and causally. A sub-sample (n = 26) was interviewed about the reasons for their preferences. The results showed that the students favoured teleological explanations over causal explanations. Although the students explained their preference judgements etiologically (i.e. teleologically and causally), they also referred to a wide range of non-etiological criteria (i.e. familiarity, complexity, relevance and five more criteria). When elaborating on their preference for causal explanations, the students often focused not on the causality of the phenomenon, but on mechanisms whose complexity they found attractive. When explaining their preference for teleological explanations, they often focused not teleologically on purposes and goals, but rather on functions, which they found familiar and relevant. Generally, students' preference judgments rarely allowed for making inferences about causal reasoning and teleological reasoning, an issue that is controversial in the literature. Given that students were largely unaware of causality and teleology, their attention must be directed towards distinguishing between etiological and non-etiological reasoning. Implications for educational practice as well as for future research are discussed.

Risk is always present in people's lives: diseases, new technologies, socio-scientific issues (SSIs) such as climate change, and advances in medicine--to name just a few examples--all carry risks. To be able to navigate risks in everyday life, as well as to participate in social debate on risk-related issues, students need to develop risk competence. Science education can be a powerful tool in supporting students' risk competence, which is an important component of scientific literacy. As there are different definitions of risk within the scientific community, the aims of this article are (1) to review the literature on two major theoretical frameworks for conceptualising risk, the realist, and the constructivist paradigms of risk and (2) to connect both in order to suggest a working definition of what can be understood as risk competence in science instruction.

In this article, the argument is put forth that controversies about the scope and limits of science should be considered in Nature of Science (NOS) teaching. Reference disciplines for teaching NOS are disciplines, which reflect upon science, like philosophy of science, history of science, and sociology of science. The culture of these disciplines is characterized by controversy rather than unified textbook knowledge. There is common agreement among educators of the arts and humanities that controversies in the reference disciplines should be represented in education. To teach NOS means to adopt a reflexive perspective on science. Therefore, we suggest that controversies within and between the reference disciplines are relevant for NOS teaching and not only "the" NOS but "about" NOS should be taught, too. We address the objections that teaching about NOS is irrelevant for real life and too demanding for students. First, we argue that science-reflexive meta-discourses are relevant for students as future citizens because the discourses occur publicly in the context of sociopolitical disputes. Second, we argue that it is in fact necessary to reduce the complexity of the above-mentioned discourses and that this is indeed possible, as it has been done with other reflexive elements in science education. In analogy to the German construct "Bewertungskompetenz" (which means the competency to make informed ethical decisions in scientific contexts), we suggest "epistemic competency" as a goal for NOS teaching. In order to do so, science-reflexive controversies must be simplified and attitudes toward science must be considered. Discourse on the scientific status of potential pseudoscience may serve as an authentic and relevant context for teaching the controversial nature of reflexion on science.

The main aim of this paper is to describe high school students' attitudes concerning evolution and creation, with a focus on (1) attitudes toward evolutionary theory, (2) attitudes toward the Biblical accounts of creation, (3) creationist beliefs, and (4) scientistic beliefs. Latent class analyses revealed seven attitude profiles in a sample of 1672 German high school students. In contrast with the prevailing focus on creationism in science education research, a scientistic attitude profile (22%) rather than a creationist attitude profile (4%) characterized the largest group in this sample. The remaining five profiles account for three-fourths of the sample and describe a range of different positions, that is, noncreationist and nonscientistic positions. Moreover, the groups of students who belonged to different attitude profiles differed significantly in terms of further variables: (a) perception of conflict between science and theology, (b) attitudes toward science, (c) attitudes toward religion, (d) understanding of the nature of science, and (e) understanding of the nature of Christian theology. The benefit of the presented approach is discussed in the context of previous studies that focused on the acceptance of evolutionary theory. Because we found evidence for a wide variety of attitudes, implications for teaching and learning evolution are discussed.

Students' explanations of biological phenomena are frequently characterized by disconnects between levels and confusion of levels. The purpose of this research is to investigate the effects of a hands-on lab activity that aims at fostering the ability to reason across levels. A total of 197 students (18 years of age) participated in a randomized, pre-post-test design study. Students in the experimental group engaged in a lab activity focused on artificial selection and designed to demonstrate how selection affects both phenotypes and genotypes. In contrast, the lab activity in the comparison group focused on phenotype alone. Data sources for the study included pre-tests of basic concepts in genetics and evolution and two post-test items requiring the students to reproduce and apply their knowledge about artificial selection. The findings indicated that the lab activity which allowed students to explore the interplay between different levels, provided vertical coherence and enhanced students' ability to explain evolutionary change in both reproduction and transfer items. In contrast, the lab activity in the comparison group failed to do so, and most students did not improve their ability to explain evolutionary change. Implications for instruction and recommendations for further research are discussed in light of these findings.

This study is concerned with different forms of assessment of pupils' skills in experimentation. The findings of three studies are reported. Study 1 investigates whether it is possible to develop reliable multiple-choice tests for the skills of forming hypotheses, designing experiments and analysing experimental data. Study 2 compares scores from multiple-choice tests with scores from an open-response test in order to investigate how to assess pupils' skills in planning two-factor experiments. Study 3 investigates whether scores from multiple-choice tests correlate with student performance in a practical test on seed germination. (Contains 3 figures and 4 tables.)