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Treagust David F. Qureshi Sheila S. Vishnumolakala Venkat Rao Ojeil Joseph Mocerino Mauro Southam Daniel C. 《Research in Science Education》2020,50(3):813-831
Research in Science Education - Educational reforms in Qatar have seen the implementation of inquiry-based learning and other student-centred pedagogies. However, there have been few efforts to... 相似文献
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A. L. Chandrasegaran David F. Treagust Mauro Mocerino 《Research in Science Education》2008,38(2):237-248
Students are generally known to memorise and regurgitate chemical equations without sufficient understanding of the changes
that occur at the particulate level. In addition, they often fail to recognise the significance of the symbols and formulas
that are used to represent chemical reactions. This article describes an evaluation of the ability of 65 Grade 9 students
(15–16 years old) from a Singapore secondary school to describe and explain seven types of chemical reactions using macroscopic,
submicroscopic and symbolic representations. The study was conducted over nine months using a supplementary teaching program
with particular emphasis on the use of multiple levels of representation to describe and explain chemical reactions. Students’
proficiency in the use of multiple levels of representation was assessed at the end of the course using a two-tier multiple-choice
diagnostic instrument that was previously developed by the authors. In order to evaluate the efficacy of the instructional
program, the instrument was also administered to another group of 76 students who were not involved in the supplementary instructional
program. The efficacy of the program was evident from the significantly improved scores on the diagnostic instrument of the
former group of students. In addition, several student conceptions in the use of multiple levels of representation were identified
that could assist teachers in their planning and implementation of classroom instruction. 相似文献
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