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Won, Mihye; Yoon, Heojeong; Treagust, David F. – Science Education, 2014
The purpose of this study was to understand how students utilized multiple representations to learn and explain science concepts, in this case the human breathing mechanism. The study was conducted with Grade 11 students in a human biology class. Semistructured interviews and a two-tier diagnostic test were administered to evaluate students'…
Descriptors: Science Instruction, Secondary School Science, Grade 11, Biology
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Rahayu, Sri; Chandrasegaran, A. L.; Treagust, David F.; Kita, Masakazu; Ibnu, Suhadi – International Journal of Science and Mathematics Education, 2011
This study was a mixed quantitative-qualitative research to evaluate the efficacy of a designed student-centred instructional (DSCI) program for teaching about acids and bases. The teaching innovation was designed based on constructivist, hands-on inquiry and context-based approaches and implemented in seven 45-min lessons with a class of 36 grade…
Descriptors: Constructivism (Learning), Experimental Groups, High Schools, Qualitative Research
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Treagust, David F.; Chittleborough, Gail; Mamiala, Thapelo L. – International Journal of Science Education, 2003
Chemistry is commonly portrayed at three different levels of representation--macroscopic, submicroscopic and symbolic--that combine to enrich the explanations of chemical concepts. In this article, we examine the use of submicroscopic and symbolic representations in chemical explanations and ascertain how they provide meaning. Of specific interest…
Descriptors: Grade 11, Chemistry, Science Instruction, Molecular Structure