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This study explores the effective visual resources in the “regularity in chemical reactions” unit of ninth grade science textbooks (2009 revised version). The frequency and role of visual resources were initially examined, and the stu­ dents' perceptions of visual resources were investigated. The results of the analysis represented the learning material presentation (68%), motivational categories (14%), guide to inquiry procedures (9%), and inquiry results and summaries (8%). According to the investigation of the students' perceptions of visual resources, the most effective visual resource for motivation is a pho­ tograph depicting physical and chemical changes, such as in bread baking and the most effective for learning material presentations in mass conservation, definite proportion, and stoichiometric concept units were a cartoon, graph, and formula representing stoi­ chiometric phenomena, respectively. The most effective resource for guide to inquiry (experimental) procedures were photo­ graphs of both instruments and sequential experiment processes; and in the inquiry results and summary category, incomplete tables and graphs for students to work on themselves. The aims of this research are to increase the usefulness of visual resources in the teaching-learning activity and provide informative supplements for the development and improvement of visual resources, according to the students' perceptions.

journal of the korean chemical society

Study on Effective Visual Resources According to Their Role in Teaching-Learning Activity - In the “Regularity in Chemical Reactions” Unit in the Ninth Grade Science Textbook