The purpose of the current study is to conduct developmental comparison of the middle school students' misconceptions about the concepts of astronomy. The sampling of the study is comprised of middle school students attending a private school located in the west of Turkey. A total of 144 students participated in the study. In order to determine the students' perceptions of the concepts of astronomy, a data collection tool consisting of five open-ended questions was developed by the researchers. The data collected through this data collection tool was subjected to content analysis; on the basis of the analysis of the students' responses, codes were determined and on the basis of these codes, themes were constructed. The results are presented as percentages and frequencies.When the findings of the study were generally evaluated, it was concluded that the students have misconceptions about the concepts of astronomy.
The object of this study is to determine the conceptual understanding that prospective Science teachers have relating "de Broglie: Matter waves" and to investigate the effect of the instruction performed, on the conceptual understanding. This study was performed at a state university located in the western part of Turkey, with the Faculty of Education-Science Teaching students (2nd year / 48 individual) in the academic year of 2010-2011. The study was planned as a single group pretest-posttest design. A two-step question was used in the study, prior to and after the instruction. Lessons were conducted using the 7E learning model in the instruction process. When all these results are evaluated, it can be said that the conceptual understanding of the prospective teachers regarding "de Broglie; matter waves" has been taken place. In general, when all the sections are examined, it has been observed that the prospective teachers have more alternative concepts prior to the instruction and more scientific concepts after the instruction. In this process, besides instruction, the prospective teachers have not taken any place in a different application regarding the basic concepts of quantum physics. Therefore, it has been determined that the 7E learning model used in the research and the activities included in the 7E learning model are effective in conceptual understanding.
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