The international and national assessment results indicated that Turkish students&rsquo / conceptual understanding in science and basic inquiry skills are far behind the expected levels. The reason of low achievement could be attributed to many sources such as family background characteristics, students&rsquo / attitudes, and teaching methodologies. The low socioeconomic environment in the school and crowded classrooms are important facts that should be somehow considered by the educational researchers. The way a teacher teaches in a crowded classroom is important to help students&rsquo / understanding of concepts and development of inquiry skills. The present study aimed to propose a methodology that helps teachers to enhance students&rsquo / understanding of concepts and develop inquiry skills in many schools with various socio-economic-status environments and large classrooms. The method proposed could be called as guided (teacher-directed) inquiry to develop concepts, skills, and affective characteristics of the students such as attitudes. This study was conducted with 168 sixth grade public elementary school students in Ankara in 2006-07 academic year. Repeated measures design was used in the study. Intact groups received either traditional or teacher-directed inquiry instructions. The students in both groups were measured with the unit achievement and science process skills tests, and attitudes toward science questionnaire before and after the instructions, and repeatedly after no treatment by a retention or delayed test. It was found that while the guided (teacher-directed) inquiry instruction made a difference on student achievement in the first unit (Reproduction, Development and Growth in Living Things), it could not make a difference on student achievement in the second unit (Force and Motion). The instruction also made a difference on students&rsquo / science process skills test performance and both the composite and individual attitude scores. It is concluded that guided (teacher-directed) inquiry instruction generally helps students&rsquo / understanding of science concepts and results with achievement in science. It helps students&rsquo / development of scientific skills with authentic experiences. Guided (teacher-directed) inquiry instruction also has an effect on students&rsquo / development of positive attitudes toward science and technology course, specifically on self-concept, anxiety, interest, career, enjoyment, and usefulness dimensions.

This study aimed to explore the relationships between elementary students&rsquo / epistemological beliefs, learning approaches, self-regulated learning strategies, and their science achievement. In this investigation, a model of the potential associations among these variables was proposed and tested by using structural equation modeling. It was hypothesized that (a) students&rsquo / epistemological beliefs would directly influence their learning approaches, self-regulated learning strategies, and science achievement, (b) students&rsquo / adopted learning approaches and their use of self-regulated learning strategies would be related with science achievement, and (c) students&rsquo / learning approaches were expected to be related with their use of self-regulated strategies. A total of 1240 seventh graders from 21 public elementary schools throughout the &Ccedil / ankaya district of Ankara completed measures designed to assess students&rsquo / (a) epistemological beliefs (beliefs about the Certainty of Knowledge, Development of Knowledge, Source of Knowing, and Justification for Knowing) (b) adopted learning approaches (either rote or meaningful), (c) use of self-regulated learning strategies, and (d) science achievement. Separate confirmatory factor analyses were conducted to determine the structure of students&rsquo / epistemological beliefs and their adopted learning approaches. While the factor analyses of students&rsquo / responses to the epistemological beliefs questionnaire supported the multidimensional nature of these beliefs, some features distinct from the findings of the Western countries were identified. Socio-cultural influences were proposed to account for the observed differences in the factor structure obtained with the Turkish sample. The results of the structural equation modeling while supporting some of the proposed hypotheses, contradicted with others. Epistemological beliefs emerged as a major contributor to learning approaches and science achievement as expected, whereas those beliefs can not be used as a predictor of self-regulated learning strategies. In addition, students&rsquo / adopted learning approaches were found to be a predictor of their self-regulated learning strategies which in turn influence the science achievement in the model. Contrary to the expectations, learning approaches of the students were not found to be directly related with their science achievement.

The purpose of the study is to investigate the effect of Middle East Technical University&amp / #8217 / s Science Centre (METU SC) on students&amp / #8217 / attitudes towards science. The sample (N=251) consisted of 131 males (52.2%) and 120 females (47.8%). The age range of the students varied from 11 to 14 (M=12.71, SD=0.80). The attitude scale was administered before, immediately after, and one week after a visit to METU SC. Because of the limitations on sampling procedure two different research designs were used. Design 1 was a quasi-experimental design (46 students in experimental group, 46 students in control group) and attempted to determine the impact of METU SC on 6th graders&amp / #8217 / attitudes towards science with respect to six constructs of the attitude scale. Design 2 was a weak experimental design (N=159) and attempted to determine the impact of METU SC on students&amp / #8217 / overall attitudes towards science with respect to their gender, grade levels, and science achievement scores. The results of this study suggest that METU SC has high potential on increasing middle school students&amp / #8217 / attitudes toward science in several dimensions. Furthermore, this increase is independent from gender, science achievement, and grade levels. Also considering that this achievement was accomplished in quite a short time (approximately one hour), science centres can be used by educators as an effective way of increasing students&amp / #8217 / attitudes toward science.

This study is aimed to explore the relationships among elementary students&rsquo / epistemological beliefs of science, perceptions of learning environments, learning approaches and science achievement. For this purpose, a model of the associations among these variables was proposed and tested by structural equation modeling. In this model, it was hypothesized that a) students&rsquo / perceptions of their learning environments would directly influence their epistemological beliefs of science and learning approaches, b) students&rsquo / epistemological beliefs of science would directly influence their learning approaches and science achievement, c) students&rsquo / learning approaches would directly influence their science achievement. A total of 2702 students from 139 public elementary schools from istanbul, Ankara, izmir, Diyarbakir, Van, Antalya, Afyon, EskiSehir, and Samsun were administered three instruments to assess their epistemological beliefs of science, perceptions of learning environments, and learning approaches. Students&rsquo / previous year final report card grades were used as the indicator of their science achievement. Confirmatory factor analyses were conducted to determine the structure of students&rsquo / epistemological beliefs of science, perceptions of learning environments, and learning approaches. Although multidimensionality of epistemological beliefs of science was supported, a different factor structure was obtained for Turkish elementary school students compared to the theoretically proposed structure for the instrument. The results of the structural equation modeling generally supported the proposed hypotheses. The final model obtained in the study revealed that students&rsquo / perceptions of the classroom environments directly predicted students&rsquo / epistemological beliefs and learning approaches. Students&rsquo / epistemological beliefs predicted their learning approaches and science achievement, and students&rsquo / learning approaches influenced their science achievement.

The purpose of the present study is to compare ability estimations obtained from computerized adaptive testing (CAT) procedure with the paper and pencil test administration results of Student Selection Examination (SSE) science subtest considering different ability estimation methods and test termination rules. There are two phases in the present study. In the first phase, a post-hoc simulation was conducted to find out relationships between examinee ability levels estimated by CAT and paper and pencil test versions of the SSE. Maximum Likelihood Estimation and Expected A Posteriori were used as ability estimation method. Test termination rules were standard error threshold and fixed number of items. Second phase was actualized by implementing a CAT administration to a group of examinees to investigate performance of CAT administration in an environment other than simulated administration. Findings of post-hoc simulations indicated CAT could be implemented by using Expected A Posteriori estimation method with standard error threshold value of 0.30 or higher for SSE. Correlation between ability estimates obtained by CAT and real SSE was found to be 0.95. Mean of number of items given to examinees by CAT is 18.4. Correlation between live CAT and real SSE ability estimations was 0.74. Number of items used for CAT administration is approximately 50% of the items in paper and pencil SSE science subtest. Results indicated that CAT for SSE science subtest provided ability estimations with higher reliability with fewer items compared to paper and pencil format.

The science and technology program developed by the Ministry of National Education of Turkey aims at training students as science and technology literates. In order to achieve this, method implemented by teachers should enhance science process skills, increase achievement and actualize differentiation in the conceptual structure of students. The present study aims to investigate the effectiveness of guided inquiry experiments over traditionally designed experiments on the acquisition of science process skills, content knowledge achievement and differentiating conceptual structure of 8th grade students about floating, sinking, buoyancy and pressure subjects. Guided inquiry laboratory manuals were developed for the experimental group. Traditional confirmation type laboratory manuals were developed for the control group. The study was conducted with 55 eighth grade students at a private elementary school in the Bah&ccedil / elievler district, Istanbul. In this quasi-experimental study, two of the three intact groups assigned as experimental group, while the control group. Unit achievement test (UAT), science process skills test (SPST) and two-tiered test for determining differentiation in conceptual structure (DDSCT) were used as data collection instruments. All of these instruments were administered to the students as pre-test and post-test. It was found that guided inquiry experiments were effective than traditional confirmation type experiments in differentiation of students&rsquo / conceptual structure about floating, sinking, buoyancy and pressure. However, there was not a significant difference in the effectiveness of both inquiry and traditional methods on enhancing the students&rsquo / science process skills and their achievement at the unit of force and motion.

The purpose of this study was to identify and describe the associations between systemic equity pedagogy (SEP) practices in highly diverse high schools and their students' science achievement and college readiness. This study focuses on science programs in ten highly diverse Texas high schools serving students who exhibit high science achievement and college readiness. According to the Policy Research Group in Science Education, only two percent of all culturally diverse high schools within the state of Texas demonstrate high science achievement and college readiness on state-tracked school-level indicators. Transforming a school context where achievement disparities exist among student groups in science classrooms necessitates that public school officials understand key factors, or “drivers,” and associated indicators contributing to SEP in programs. A model for programs is suggested using a framework for SEP based on data collected from ten highly successful, high diversity high schools. The following research questions address the research gap regarding indicators of SEP associated with high science achievement and college readiness in highly culturally diverse high schools. How do data from ten highly successful, high diversity high schools inform the development of a comprehensive SEP rubric? How do high achieving high schools of culturally diverse student populations score on a comprehensive SEP rubric? How do teachers’ perceptions toward implementing SEP practices vary in different schools? Three research papers detail the research of this dissertation. The purpose for the first paper is to increase understanding of indicators facilitating systemic and equitable teaching and learning practices, otherwise referred to as systemic equity pedagogy (SEP). Results of the study show indicators of a comprehensive SEP rubric. Together, 127 indicators, thirty categories, and eight SEP drivers form a model framing equitable teaching and learning practices associated with high science achievement and college readiness. In conclusion, indicators within the SEP rubric can be described as action-oriented descriptors that science teachers engage formally or informally in order to facilitate quality science education for all students. The purpose for paper two is to score equitable teaching and learning practices in highly successful high school science programs based on the SEP rubric. Findings reveals that implementation of various equitable teaching and learning practices vary across science programs and these practices can be described as both pedagogical and non-pedagogical. In conclusion, varying degrees of implementation exist for indicators in the SEP rubric. In paper three, the purpose is to understand science teachers’ attitude and approach toward implementing systemic teaching and learning practices. Results from this study provide scores that indicate science teachers’ perceptions of their approach to SEP. This study concludes by suggesting high achieving science programs may operate within a continuum for implementing equitable teaching and learning practices.

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This study examines factors that affect student motivation and achievement in the middle school eighth grade science classroom, including, teacher-student relationships, student-peer relationships, teacher expectations in science, student preference of instructional delivery (labs vs. lecture), teacher demographics (experience at local school, professional experience, qualifications, age range), and student perceptions of teacher expectations in science. One hundred fifty survey participants were used in this quantitative study which included an analysis of the independent variables affecting student motivation and academic achievement. The findings of this study determined that there is a statistically significant relationship between student motivation and student perceptions of teacher expectations, actual teacher expectations, teacher’s age, teacher’s highest level of education, and whether or not a student received free or reduced lunch.

The purpose of the study was to investigate relationships among 7th grade students&rsquo / personal goal orientations, perceptions of classroom goal structure, and learning related variables of efficacy, self-handicapping strategies, cheating behavior, and science achievement. This study was carried out during 2006-2007 spring semester at 12 public elementary schools in Ke&ccedil / i&ouml / ren, Ankara. A total of 1950 seventh grade students from 62 classrooms participated in the study. Data were collected through Patterns of Adaptive Learning Scales and Science Achievement Test. Hierarchical Linear Modeling (HLM) analyses were conducted due to the nested structure of data. Results revealed that students who demonstrated high efficacy, high science achievement, low cheating behavior, and low self-handicapping strategies, which were all adaptive learning patterns, had higher mastery goal orientations. Findings regarding performance-approach goal oriented students, focusing on demonstrating their ability, however, were not as straightforward. Performance approach goals were associated with high efficacy and high demonstration of cheating behavior. Class level analyses, on the other hand, revealed that students&rsquo / perception of the classroom goal structure was a significant predictor of personal goal orientations they adopted. While learning environments emphasizing understanding of the material and self-improvement promoted students&rsquo / adoption of mastery goals / learning environments focusing on performance and relative ability of students promoted students&rsquo / adoption of performance-approach goals. The current study, thus, demonstrated the influence of goal structure of the learning environment on students&rsquo / personal goal orientations which in turn found to be related with various learning related variables.