The Development of Teaching Materials Based on Conceptual Understanding, Chemical Representation, and Representation Competence on Chemical Kinetics Materials Ion Wijaya (a), Herunata (b*), Oktavia Sulistina (c), Nazriati (d)
Department of Chemistry, Faculty of Mathematics and Natural Sciences, Universitas Negeri Malang, Indonesia
*herunata.fmipa[at]um.ac.id
ionwijaya69[at]gmail.com
Abstract
Chemistry, especially the chapter of reaction rates, studies the composition of matter, changes in matter, basic laws, and abstract concepts. The reaction rate chapter is considered difficult by students so that a source and learning media are needed to make it easier for students to learn it. One of the sources and learning media is teaching materials. Teaching materials have an important role because they are tools to achieve learning objectives. Therefore, new reaction rate teaching materials need to be created to accommodate abstract concepts. These concepts can be described by chemical representation, then explained through representation competence. Based on the description above, this study aims to 1) develop valid and appropriate Teaching Materials for Chemical Kinetics Based on Understanding Concepts, Chemical Representation, and Representation Competence, and 2) analyze the validity and legibility tests of the developed teaching materials. The research and development design used is the define stage, design stage, develop stage, and disseminate stage which refers to the 4-D model by Thiagarajan et al (1974). However, the disseminate stage was not carried out due to time and cost consideration. The results of the validation of teaching materials obtained an overall average value of 93.5% with a very valid category. Meanwhile, the results of the legibility test of teaching materials obtained an overall average value of 87.5% with a very decent category. Based on the results of the research conducted, it is known that the teaching materials developed are categorized as very feasible with few revisions to be used. Following up on the research conducted, this teaching material can be further developed to the develop stage.
Keywords: Teaching Materials, Chemical Concepts, Chemical Representation, Representation Competence
