Browsing by Subject "Chemistry education"

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Open Access
Effects of a 5Es learning model on the conceptual understanding and science process skills of pre-service science teachers: the case of gases and gas laws
(Serbian Chemical Society, 2020) Karslı-Baydere, Fethiye; Ayaş, Alipaşa; Çalık, M.
The aim of this study was to investigate the effects of using a 5Es learning model on the pre-service science teachers’ conceptual understanding and science process skills for “gases and gas laws”. The sample of the study consisted 49 pre-service science teachers enrolled for the “Science Laboratory Practices-I” course within the department of science education of a Turkish state university. Through a quasi-experimental research method (pre- and post- -test research design), an experimental group was exposed to the 5Es learning model (engage-explore-explain-elaborate-evaluate) with different conceptual change methods/techniques (i.e., worksheets, computer animations, analogies and experiments). A control group was also taught through existing instruction (e.g., experiments, lecture and question–answer). Data were collected through the gas laws test and the science process skills test. The results of partial eta squared (η2) revealed large-size effects for the control (0.61) and experimental groups (0.73). The 5Es learning model was more effective than the existing instruction in overcoming the pre-service science teachers’ alternative conceptions of “gases and gas laws”, as well as in improving their science process skills. The current study recommends that the 5Es learning model be tested with a larger sample throughout a long-term teaching intervention.
Open Access
Effects of storylines embedded within the context-based approach on pre-service primary school teachers’ conceptions of matter and its states
(The Education University of Hong Kong, 2015-12) Demırcıoğlu, H.; Ayas, A.; Demırcıoğlu, G.; Özmen, H.
In this study, the effect of the context-based approach on pre-service primary school teachers’ understanding of matter and its states and their attitude towards chemistry was investigated. Using a simple experimental design, the study was conducted with 35 pre-service primary school teachers who were exposed to context-based material with storylines. Two instruments were used to collect data as pre-test, post-test, and delayed-test: the States of Matter Achievement Test (SMAT) and the Chemistry Attitude Scale (CAS). Also, semi-structured interviews were conducted with the pre-service primary school teachers after the implementation. The results indicated that the use of storylines embedded within a context-based approach resulted in better understanding of the concepts of matter and its states. Furthermore, the approach helped pre-service teachers gain positive attitudes towards chemistry. This improved performance was also observed in the delayed test. Overall, the results showed that the intervention had considerable effects on remedying pre-service teachers’ alternative conceptions. Some suggestions are made on the implications for practice and learning.