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    The Contribution of Constructivist Instruction Accompanied by Concept Mapping in Enhancing Pre-service Chemistry Teachers' Conceptual Understanding of Chemistry in the Laboratory Course
    (SPRINGER, 2009) Aydin, Sevgi; Aydemir, Nurdane; Boz, Yezdan; Cetin-Dindar, Ayla; Bektas, Oktay
    The present study aimed to evaluate whether a chemistry laboratory course called "Laboratory Experiments in Science Education" based on constructivist instruction accompanied with concept mapping enhanced pre-service chemistry teachers' conceptual understanding. Data were collected from five pre-service chemistry teachers at a university in Ankara by means of a concept test and semi-structured interviews. Results showed that pre-service teachers had some alternative conceptions about chemistry topics. Moreover, using constructivist instruction accompanied with concept maps as an instructional tool was effective to promote conceptual understanding. Participants thought that concept maps were useful especially in recognizing the relation between different chemistry concepts.
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    Development of a three-tier test to assess high school students' understanding of acids and bases
    (ELSEVIER SCIENCE BV, 2011) Cetin-Dindar, Ayla; Geban, Omer
    Two-tier tests are such as assessment tools that can make available for teachers/researchers to determine students alternative conceptions and whether a student gives a correct response to a question by understanding the related subject since the second-tier of a test asks for a reason for the first-tier response. The purpose of this study was to develop a valid and reliable three-tier diagnostic test to assess students' understanding of acids-bases concepts. For developing this test, interviews and open-ended questions were administered to high school students and related literature was reviewed; the findings obtained from these steps construct the three-tier test. (c) 2011 Published by Elsevier Ltd. Open access under CC BY-NC-ND license.
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    Pre-service chemistry teachers' knowledge regarding laboratory equipment and their functions
    (ELSEVIER SCIENCE BV, 2011) Bektas, Oktay; Tuysuz, Mustafa; Kirbulut, Zubeyde Demet; Cetin-Dindar, Ayla
    The purpose of the current study was to investigate pre-service chemistry teachers' knowledge about chemistry laboratory equipments and their functions. The sample of this study consisted of eight pre-service chemistry teachers. Open-ended questions were used in this study. The findings of this study showed that most of the participants mentioned the erlenmeyer and thermometer as laboratory equipments when they were asked to write the equipments that they remembered. Additionally, it was seen that participants had difficulties in explaining the function of the equipments. This study concluded that pre-service chemistry teachers did not identify laboratory equipments and know their functions appropriately. (c) 2011 Published by Elsevier Ltd. Open access under CC BY-NC-ND license.