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Cheng, Maurice M. W.; Gilbert, John K. – International Journal of Science Education, 2017
This paper proposes a model-based notion of "submicro representations of chemical reactions". Based on three structural models of matter (the simple particle model, the atomic model and the free electron model of metals), we suggest there are two major models of reaction in school chemistry curricula: (a) reactions that are simple…
Descriptors: Science Instruction, Chemistry, Scientific Concepts, Models
Cheng, Maurice M. W.; Oon, Pey-Tee – International Journal of Science Education, 2016
This paper reports the results of a survey of 3006 Year 10-12 students on their understandings of metallic bonding. The instrument was developed based on Chi's ontological categories of scientific concepts and students' understanding of metallic bonding as reported in the literature. The instrument has two parts. Part one probed into students'…
Descriptors: Chemistry, Item Response Theory, Science Instruction, Foreign Countries
Cheng, Maurice M. W.; Gilbert, John K. – International Journal of Science Education, 2014
This study investigated the mental representations of metallic bonding and the malleability of metals held by three male students aged 14-15 (Year 10) who were attending a Hong Kong school. One student was selected by their chemistry teacher as representing each of the highest, the medium, and the lowest level of attainment in chemistry in a…
Descriptors: Foreign Countries, Chemistry, Science Instruction, Secondary School Science
Cheung, Derek – International Journal of Science Education, 2009
Students' attitudes toward chemistry lessons in school are important dependent variables in curriculum evaluation. Although a variety of instruments have been developed by researchers to evaluate student attitudes, they are plagued with problems such as the lack of theoretical rationale and of empirical evidence to support the construct validity…
Descriptors: Student Attitudes, Curriculum Evaluation, Construct Validity, Test Construction
Peer reviewed
Heyworth, Rex M. – International Journal of Science Education, 1999
Reports on procedural and conceptual knowledge for solving a basic quantitative problem in chemistry by expert and novice secondary school students. Concludes that the major differences between experts and novices lay in conceptual understanding, use of a qualitative procedure, and the type of strategy used. Suggests some instructional techniques…
Descriptors: Chemistry, Foreign Countries, Mathematical Applications, Physics