We examined the intersection of students' understanding and acceptance of evolution and their epistemological beliefs and cognitive dispositions. Based on previous research, we hypothesized there would be a relation between understanding and acceptance. We also hypothesized that students who viewed knowledge as changing and who have a disposition toward open-minded thinking would be more likely to accept the scientific explanation of human evolution, and that beliefs and dispositions would not be related to acceptance of a topic that is generally perceived as noncontroversial. Ninety-three undergraduate students enrolled in a nonmajors biology class completed measures of their (a) content knowledge of evolution and photosynthesis and respiration; (b) acceptance of theories of animal evolution, human evolution, and photosynthesis; and (c) epistemological beliefs and cognitive dispositions. Although our findings did reveal a significant relation between knowledge and reported acceptance for photosynthesis, there was no relation between knowledge and acceptance of animal or human evolution. Epistemological beliefs were related to acceptance, but only to the acceptance of human evolution. There was no relation between students' epistemological beliefs and their general acceptance of animal evolution or photosynthesis. Three subscales, Ambiguous Information, Actively Open-Minded Thinking, and Belief Identification, were significantly correlated with understanding evolutionary theory. We argue these findings underscore the importance of intentional level constructs, such as epistemological beliefs and cognitive dispositions, in the learning of potentially controversial topics. ß

The Teacher-Centered Systemic Reform model (TCSR) recognizes teaching context, teacher characteristics, teacher thinking, and their interactions as influential factors in attempts to implement classroom reform. Using the TCSR model, teachers’ personal practical theories, and conceptual change as a framework, the authors of this article studied three college science faculty members as they designed and implemented an integrated, inquiry-based science course. The documentation and analysis of context, instructors’ knowledge and beliefs, and teaching episodes allowed the authors to identify and study the interaction of factors, including grant support, that shape reform attempts. The results suggest that grant-supported mitigation of structural barriers is a necessary but insufficient precursor to change and that personal practical theories are the most powerful influence on instructional practice. The findings highlight the critical role of pedagogical and contextual dissatisfaction in creating a context for fundamental change.

ABSTRACT:In this quantitative study, we compare the efficacy of Level 2, guided inquirybased instruction to more traditional, verification laboratory instruction in supporting student performance on a standardized measure of knowledge of content, procedure, and nature of science. Our sample included 1,700 students placed in the classrooms of 12 middle school and 12 high school science teachers. The instruction for both groups included a week long, laboratory-based, forensics unit. Students were given pre-, post-, and delayed posttests, the results of which were analyzed through a Hierarchical Linear Model (HLM) using students' scores, teacher, level of school, Reformed Teaching Observation Protocol (RTOP) scores, and school socioeconomic status. Overall, compared to students in traditional sections, students who participated in an inquiry-based laboratory unit showed significantly higher posttest scores; had the higher scores, more growth, and long-term retention at both the high school and middle school levels, if their teacher had stronger implementation of inquiry methods (as measured by RTOP scores); and tended to have better outcomes than those who learned through traditional methods, regardless of level of poverty in the school. Our findings suggest that Level 2 inquiry can be an effective teaching approach to support student learning as measured through standardized assessments.C 2010 Wiley Periodicals, Inc. Sci Ed 94: 577 -616, 2010

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Inquiry is seen as central to the reform of science teaching and learning, but few teachers have experience with scientific inquiry and thus possess very naïve conceptions of it. One promising form of professional development, research experiences for teachers (RETs), allows teachers to experience scientific inquiry in the hopes that these experiences will then translate to inquiry in the classroom. As intuitively pleasing as these programs are, scant evidence documents their effectiveness. For this study, four secondary science NO SILVER BULLET FOR INQUIRY 323teachers were followed back to their classrooms following a 6-week, marine ecology RET. The research employed qualitative and quantitative data collection to answer these questions: What were the teachers' initial conceptions and enactment of classroom inquiry, and how did they change after the RET?; How did changes in the nature and use of questions highlight changes in inquiry enactment?; and How were the teachers' changes linked to the RET and are there changes that cannot be explained by the RET experience? Teachers who entered the program with more sophisticated, theory-based understanding of teaching and learning were more apt to understand inquiry as a model and to use classroom-based inquiry throughout their teaching following the program. Implications for professional development are discussed.

This study examined the influence of field placements settings with varying demographic profiles on preservice elementary teachers. Data were gathered at three points during the participants' final year in their teacher preparation program in order to chart changes over time in science teaching self‐efficacy beliefs. These measures were supplemented by interviews to investigate attitudes about teaching science in diverse settings. Gee's identity framework (2000) and the dimensions of teacher development described by Bullough et al. [Bullough et al. [2004] Teachers and Teaching: Theory and Practice 10:365–394] were employed as interpretive tools. Statistical analyses of teaching self‐efficacy scores revealed marginal changes over time. Individual interviews revealed no discernible influence upon the teacher candidates' perceptions of science teaching selves that could be attributed to the demographics of their field placements. Emerging from this study was the previously underappreciated value of self‐doubt as a factor in motivating preservice teachers. The findings call into question the tendency to use heightened teaching self‐efficacy as an indicator of individual or programmatic success. This examination of preservice teacher development over the final year of a preparatory program, especially when considered in light of student diversity, demonstrates the soundness of Dewey's claim that uncertainty is a crucial component of learning and knowing. © 2008 Wiley Periodicals, Inc. J Res Sci Teach 46: 102–125, 2009

This study explores two differing perspectives of the nature of students' biological knowledge structures, conceptual frameworks, and p-prims. Students from four grade levels and from three regions of the United States were asked to explain a variety of biological phenomena. Students' responses to the interview probes were analyzed to describe 1) patterns in the nature of students' explanations across grade levels and interview probes, and 2) the consistency of students' explanations across individual interview probes and across the range of probes. The results were interpreted from both perspectives of knowledge structures. While definitive assertions supporting either perspective could not be made, each hypothesis was explored. Although the more prevalent description of student conceptions within a broader conceptual framework could not be discounted, the p-prim of need as a rationale for change was also found to offer a useful description of knowledge frameworks for this content area. The difficulties endemic to the use of biology for the study of basic knowledge structures are also discussed.

Understanding the interaction between internally constructed and externally imposed aspects of the teaching context may be the missing link between calls for school reform and teachers' interpretation and implementation of that reform. Although the context of the local school culture has a profound impact on teachers, there are other external forces that are specifically aimed at influencing teachers' pedagogical and curricular decisions. These externally imposed aspects of context include some of the existing tools of reform, such as national standards, mandated state core curricula, and related criterion-referenced testing. However, little is known about how these reform tools impact teachers' thinking about science and science teaching or how teachers respond to such tools. This study examined the interactions between individual teachers' beliefs about teaching and learning science in elementary school and the tools of reform that are imposed upon them. Comparative case studies were conducted in which two elementary teachers' science instruction, teaching context, and related beliefs were examined, described, and analyzed. In this study, the teachers' fundamental beliefs about science and what it means to teach and learn science influenced their interpretations of the sometimes contradictory messages of reform as they are represented in the standards, mandated curriculum, and end-of-level tests. Suggestions about what these findings mean for needed aspects of teacher professional development are offered. ß