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Chandrasegaran, A. L.; Treagust, David F.; Mocerino, Mauro – Teaching Science, 2011
This study involved the evaluation of the efficacy of a planned instructional program to facilitate understanding of the macroscopic, submicroscopic and symbolic representational systems when describing and explaining chemical reactions by sixty-five Grade 9 students in a Singapore secondary school. A two-tier multiple-choice diagnostic instrument…
Descriptors: Diagnostic Tests, Chemistry, Foreign Countries, Grade 9