The purpose of this study was to investigate the possible relationships between pre-service science teachers&#039 / understanding of nature of science (NOS) and their personal characteristics / understanding of nature of scientific inquiry (NOSI), epistemological world views, self-efficacy beliefs regarding science teaching, attitudes towards science teaching, metacognitive awareness level and faith/worldview schemas. The sample of the present study were 60 PSTs that are 3rd year students at elementary science education department at a public university in the Marmara region. The sample was chosen by using purposive sampling from the PSTs enrolled in the &quot / Nature of Science and History of Science&quot / course. Using a descriptive and associational case study design PSTs&rsquo / understandings of NOS, understanding of NOSI, epistemological world views, metacognitive awareness levels, self-efficacy beliefs, attitudes toward science teaching, and faith/worldviews were determined through different questionnaires and the associations between variables were investigated. Qualitative and quantitative questionnaires were analyzed and statistical analyses were conducted to see whether there is an association between PSTs&#039 / level of understanding of NOS and their personal characteristics. The results of the study revealed that PSTs understanding of NOS and NOSI were highly related. Similarly, self-efficacy beliefs regarding science teaching, metacognitive awareness levels and faith/worldviews of the PSTs were found to be significantly related to understanding of NOS. On the other hand, there were not any significant associations between PSTs&#039 / epistemological world views, attitudes towards science teaching and understanding of NOS.

The current study aimed to investigate the effect of using metacognitive strategies embedded in explicit&ndash / reflective NOS instruction to improve NOS understanding of pre-service science teachers. Metacognitive Awareness Inventory (MAI) (Schraw &amp / Dennison, 1994) and Views of Nature of Science Questionnaire (VNOS-C) (Lederman et al., 2001) were used both at the beginning and at the end of the study as a pre-test&ndash / post-test, comparison group, quasi-experimental design. A total of 33 pre-service science teachers (PSTs), 24 were female and 9 were male agreed to join the study voluntarily. These students were selected for this study while they were enrolling at their 5th semester in which they attended Methods of Teaching Science I course offered by the faculty of education at Middle East Technical University. Participants were divided into two groups namely comparison and intervention group. Explicit reflective NOS instruction was used in both groups, but metacognitive strategies additionally used in intervention group. Data analysis demonstrated that explicit reflective NOS instruction enhanced the development of understanding of NOS in both groups. Results also showed that metacognitive strategies improved the metacognitive awareness of intervention group participants. Although four of these metacognitive strategies and explicit reflective NOS instruction in present study provided a substantial increase in NOS understandings of PSTs in intervention group, chi-square analysis showed statistically no significant difference between comparison and intervention group participants&rsquo / post-test results.

This study was designed to identify students’ perceptions of learning activities, assessment formats, and content on their understanding of the nature of science (NOS) by comparing and examining constructs created by Canadian and Korean students. Participants were 217 Canadian and 319 Korean Grade 8 students that filled out questionnaires; additionally, 9 students volunteered for semi-structured interviews. Descriptive statistics, multivariate analysis of variance and partial least squares were used to examine the quantitative data. A conceptually clustered matrix was used for the qualitative analyses. Results indicated that students from both countries perceived 1) their learning activities were teacher-directed, 2) class presentations and discussions occurred least frequently, 3) paper-and-pencil tests determined science scores, 4) science tests relied heavily on knowledge of science while knowledge about science was least likely to be assessed, and 5) generally students held relativistic views on science. The effect for country on NOS concepts was statistically significant across all of their perceptions except for the concepts of culturally embedded science and the perceptions of short-answer test formats. Specifically, Canadian students perceived that they had relatively more student-directed activities while Korean students perceived that they had more teacher-directed science lab activities. Further, Canadian students were inclined to hold more relativistic views across the NOS concepts. It was also noted that Korean students provided more political examples while Canadian students provided stem cell research or environmental issues. An examination of associations revealed that students’ learning activities, assessment formats, and content are good predictors of NOS understanding since these constructs explain variances from 19.7% for Empirical NOS to 63% for Scientific Methods. Results from students’ open-ended responses to the NOS concepts and the semi-structured interviews were consistent with the quantitative analyses. Most interviewees agreed that what, and how, they learned science-- and how their learning was assessed--affected their views of science since school science education was the important factor in developing their scientific knowledge. These results imply that diverse learning activities and assessments could prove to be a better approach to enhancing students’ understanding of NOS than teacher-directed learning activities and test formats requiring a single correct answer.

The purpose of this study is to examine philosophical hermeneutics as a referent for student understanding of Nature-of-Science (NOS) concepts. Rather than focus on a prescriptive set of canons used in addressing NOS pedagogy in K-12 schools, this study seeks to explicate a descriptive set of principles based on Hans Georg-Gadamer’s theory of interpretation that has the potential for developing dispositions necessary for understanding. Central among these are the concepts of fore-structure, prejudice, temporal distance, and history of effect, all of which constitute part of the whole of the hermeneutic circle as envisaged by Gadamer. As such, Gadamer’s hermeneutics is contrasted with Cartesian epistemology and its primacy of method, the Enlightenment’s prejudice against prejudice, the modernist/progressive tendency to consider all situations as problems to be solved by relegating all forms of knowledge to techné, and the subjective nature of interpretation inherent in a hermeneutics of suspicion. The implication of such a conceptual analysis for NOS pedagogy is that student understanding is considered not so much as a cognitive outcome dependent on a series of mental functions but rather as an ontological characteristic of Dasein (being-human) that situates learning in the interchange between interpreter and text. In addition, the philosophical foundations implicit in addressing student understanding of NOS found in many curricular reform efforts and pedagogical practices in science education are questioned. Gadamer’s hermeneutics affords science education a viable philosophical framework within which to consider student understanding of the development of scientific knowledge and the scientific enterprise.

Current curriculum trends promote inquiry-based student-centered strategies as a way to foster critical thinking and learning. Problem-based learning (PBL), a type of inquiry focusing on an issue or “problem,” is an instructional approach taught on the basis that science reform efforts increase scientific literacy. PBL is a constructivist approach to learning real life problems where understanding is a function of content, context, experiences, and learner goals; historical PBL situates the lesson in a historical context and provides opportunities for teaching NOS concepts. While much research exists on the benefits of historical PBL to student learning in general, more research is warranted on how teachers implement PBL in the secondary science curriculum. The purpose of this study was to examine the classroom-learning environment of four science teachers implementing a historical PBL instructional unit to identify the teachers’ understandings, successes and obstacles. By identifying teachers’ possible achievements and barriers with implementing a constructivist philosophy when executing historical PBL, educators and curriculum designers may improve alignment of the learning environment to constructivist principles. A qualitative interpretive case study guided this research study. The four participants of this study were purposefully and conveniently selected from biology teachers with at least three years of teaching experience, degrees in education, State Licensure, and completion of a PBL workshop. Data collection consisted of pre and post questionnaires, structured interviews, a card sort activity in which participants categorized instructional outcomes, and participant observations. Results indicated that the four teachers assimilated reform-based constructivist practices to fit within their preexisting routines and highlighted the importance of incorporating teachers’ current systems into reform-based teacher instruction. While participating teachers addressed a few NOS tenets, emphasizing the full range of possible NOS objectives included in historical PBL is warranted. This study also revealed the importance of creating a collaborative classroom culture and building positive student-teacher relationships when implementing PBL instruction. The four teachers agreed that the historical PBL instructional unit provided a context for learning state standards, and they positively viewed their experiences teaching the lesson. Thus findings from this study suggest that teaching science in a historical context using PBL can be effective.

Bandura (1986) posited that self-efficacy beliefs help determine what individuals do with the knowledge and skills they have and are critical determinants of how well skill and knowledge are acquired. Research has correlated self-efficacy beliefs with academic success and subject interest (Pajares, Britner, & Valiante, 2000). Similar studies report a decreasing interest by students in school science beginning in middle school claiming that they don’t enjoy science because the classes are boring and irrelevant to their lives (Basu & Barton, 2007). The hypothesis put forth by researchers is that students need to observe models of how science is done, the nature of science (NOS), so that they connect with the human enterprise of science and thereby raise their self-efficacy (Britner, 2008). This study examined NOS understandings and science self-efficacy of students enrolled in a sixth grade earth science class taught with explicit NOS instruction. The research questions that guided this study were (a) how do students’ self-efficacy beliefs change as compared with changes in their nature of science understandings?; and (b) how do changes in students’ science self-efficacy beliefs vary with gender and ethnicity segregation? A mixed method design was employed following an embedded experimental model (Creswell & Plano Clark, 2007). As the treatment, five NOS aspects were first taught by the teachers using nonintegrated activities followed by integrated instructional approach (Khishfe, 2008). Students’ views of NOS using the Views on Nature of Science (VNOS) (Lederman, Abd-El-Khalick, & Schwartz, 2002) along with their self-efficacy beliefs using three Likert-type science self-efficacy scales (Britner, 2002) were gathered. Changes in NOS understandings were determined by categorizing student responses and then comparing pre- and post-instructional understandings. To determine changes in participants’ self-efficacy beliefs as measured by the three subscales, a multivariate analysis of covariance (MANCOVA) was conducted. Findings indicated that explicit NOS instruction was effective for all students except minority (Black, Hispanic, Asian, or multiracial) male students in improving NOS understandings. Furthermore, all students that received NOS instruction demonstrated decreased anxiety towards science. Future research should focus on long-term investigations of changes in anxiety and value of research constructs with regards to NOS instruction.

The aim of this study is to investigate the elementary school students&amp / #8217 / understandings of the nature of science (NOS). A total of 1949 students (1026 sixth graders and 923 eighth graders) from six different elementary schools participated in the study. Nature of Science Questionnaire for Elementary Level (E-NOS) questionnaire, adapted from Views on Science-Technology-Society (VOSTS) developed by Aikenhead, Fleming and Ryan (1989) and Views on Nature of Science (VNOS-D) constructed by Lederman, Adb-El-Khalick, Bell and Schwartz (2002), was used to assess the students&amp / #8217 / views on the NOS. E-NOS consisted of eleven items that examined the students&amp / #8217 / views on seven constructs concerning the NOS, namely tentativeness, subjectivity and creativity of scientific knowledge, social and cultural embeddedness of science, the role of observations and inferences, theories and laws and uncertainty in developing science. Additionally, the definitions of science, the difference of science from the other disciplines and scientific approach in scientific investigations were examined. Semi-structured interviews were also conducted by twelve volunteer students (7 sixth and 5 eighth graders) to investigate the students&amp / #8217 / views on nature of science in depth. Data were analyzed both frequency and Chi-squire analyses. Results of this study revealed that the majority of Turkish elementary school students held traditional views on some aspects of the nature of science. According to these results, it was especially notable that the largest group of the students was not aware of the fact that scientific theories and laws are different kinds of scientific knowledge. In addition, many of the students had the idea that there is certain and defined scientific method in order to develop scientific knowledge. It was also found that more 8th grade students held contemporary (realistic) views of the tentative and subjective nature of science and the role of precision and uncertainty in science and more 6th graders had contemporary views on the role of observations and inferences in science. Furthermore, it was indicated that more female students than males possessed contemporary views on the subjectivity and creativity of the nature of science. Chi-square statistics also displayed that there are statistically significant differences in distributions of the students&amp / #8217 / responses on all aspects of the nature of science with respect to grade level. In addition, it was found that there are statistically significant differences in distributions of the students&amp / #8217 / responses on the subjective nature of scientific knowledge, social and cultural embeddedness of the scientific knowledge, creativity and the role of prediction and uncertainty in science and scientific approach to investigations in science with respect to gender.

The aim of this study was to examine middle school science textbooks according to some criteria in terms of nature of science (NOS). A total of three middle school science textbooks in 6th, 7th and 8th grade and two biology units were analyzed in each textbook. In the 6th grade science textbooks, Reproduction, Development and Growth in Living Beingsand Systems in Our Body units, in the 7th grade science textbook, Systems in Our Body and Human and Environment units, in the 8th grade science textbook, Cell Division and Heredity and Livings and Energy Relationships units were analyzed by using Nature of Science Criteria, adapted from Gunckel&amp / #8217 / s (2004) study. The instrument consists of 3 categories, 9 criteria and 28 indicators. The categories are: Science as Authoritative Knowledge, Science as Understanding Phenomena and Science as the Social Construction of Knowledge. A qualitative oriented approach was performed and content analysis method was used to assess the science textbooks. Data were analyzed by percentage and frequency analysis. Reliability was calculated by Cohen&amp / #8217 / s Kappa and the value 0,71 which was found is reliable. The results of this study revealed that the three science textbooks inadequately presented the nature of science categories. It was also found that the percentages of almost all the indicators were under fifty. The textbooks presented the science as authoritative knowledge category relatively higher than the other two categories. The science as the sociocultural construction of knowledge category was portrayed less than the other two categories.

Education reform in the U.S. promotes the teaching of inquiry in science to help students understand how science is done and to increase constructivist, student centered instruction. This qualitative study investigated changes in teachers' understandings about scientific inquiry and nature of science as well as science teaching as a result of participation in one of three summer science research programs. This study also explored what teachers reported valuing about their experiences as they progressed through the program and returned to their classrooms.Data were collected through open-ended surveys, semi-structured interviews, program observation and artifact analysis before, during, and after the research programs as well as follow-up surveys and semi-structured interviews six to nine months after the research programs had ended. In addition to overall findings, six cases are presented to highlight changes and growth that occurred.Participation in these programs did not always lead to the outcomes intended by facilitators, such as strong changes in teachers' understandings about scientific inquiry and full implementation of research with their students; yet there were significant positiveoutcomes from participants' perspectives.Teachers' understandings of scientific inquiry and nature of science changed in small ways as measured by a modified Views of Scientific Inquiry/Views of Nature of Science Survey; however, participants changed their descriptions of science teaching after the programs. These descriptions included more affective goals for their students, the use of more student centered activities, and the importance of engaging students in research. On their post surveys, participants reported their intentions to implement more classroom inquiry, including science research. In follow-up surveys and interviews teachers reported engaging students in more active roles in their classrooms. In addition,teachers reported valuing a number of other outcomes from their participation in these programs. These included increased knowledge and skills in science, insider information about professional science, increased credibility, professional and personal growth, and improvements in students' knowledge and engagement in science and research. An emergent finding of the study was that participating in these research programs had an influence on some participants' identities related to doing science, being a scientist, and teaching science.

This study was designed to identify students’ perceptions of learning activities, assessment formats, and content on their understanding of the nature of science (NOS) by comparing and examining constructs created by Canadian and Korean students. Participants were 217 Canadian and 319 Korean Grade 8 students that filled out questionnaires; additionally, 9 students volunteered for semi-structured interviews. Descriptive statistics, multivariate analysis of variance and partial least squares were used to examine the quantitative data. A conceptually clustered matrix was used for the qualitative analyses. Results indicated that students from both countries perceived 1) their learning activities were teacher-directed, 2) class presentations and discussions occurred least frequently, 3) paper-and-pencil tests determined science scores, 4) science tests relied heavily on knowledge of science while knowledge about science was least likely to be assessed, and 5) generally students held relativistic views on science. The effect for country on NOS concepts was statistically significant across all of their perceptions except for the concepts of culturally embedded science and the perceptions of short-answer test formats. Specifically, Canadian students perceived that they had relatively more student-directed activities while Korean students perceived that they had more teacher-directed science lab activities. Further, Canadian students were inclined to hold more relativistic views across the NOS concepts. It was also noted that Korean students provided more political examples while Canadian students provided stem cell research or environmental issues. An examination of associations revealed that students’ learning activities, assessment formats, and content are good predictors of NOS understanding since these constructs explain variances from 19.7% for Empirical NOS to 63% for Scientific Methods. Results from students’ open-ended responses to the NOS concepts and the semi-structured interviews were consistent with the quantitative analyses. Most interviewees agreed that what, and how, they learned science-- and how their learning was assessed--affected their views of science since school science education was the important factor in developing their scientific knowledge. These results imply that diverse learning activities and assessments could prove to be a better approach to enhancing students’ understanding of NOS than teacher-directed learning activities and test formats requiring a single correct answer.