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Direct linkTan, Kim Chwee Daniel; Treagust, David F.; Chandrasegaran, A. L.; Mocerino, Mauro – Chemistry Education Research and Practice, 2010
In chemical kinetics, in addition to the concepts related to kinetics, stoichiometry, chemical equilibrium and the characteristics of the reactants are often involved when comparing the rates of different reactions, making such comparisons very challenging for students at all levels, as well as for pre-service science teachers. Consequently, four…
Descriptors: Kinetics, Chemistry, Stoichiometry, Graphs
Chandrasegaran, A. L.; Treagust, David F.; Mocerino, Mauro – Journal of Chemical Education, 2009
An alternative program of instruction was implemented with 33 high-achieving Grade 9 students (15-16 years old) in Singapore that overtly focused on the use of macroscopic, submicroscopic, and symbolic representations to describe and explain the changes that occurred during the burning of metals, reactions of dilute acids, ionic precipitations,…
Descriptors: Foreign Countries, Nontraditional Education, High Achievement, Grade 9
Othman, Jazilah; Treagust, David F.; Chandrasegaran, A. L. – International Journal of Science Education, 2008
A thorough understanding of chemical bonding requires familiarity with the particulate nature of matter. In this study, a two-tier multiple-choice diagnostic instrument consisting of ten items (five items involving each of the two concepts) was developed to assess students' understanding of the particulate nature of matter and chemical bonding so…
Descriptors: Chemistry, Foreign Countries, Grade 9, Grade 10
