Development of Math Comic Learning Media on The Subject of Algebraic Expressions for Seventh Grade of Junior High School Students

This development research aimed to 1) know the development process of mathematical comic learning media on the subject of algebraic expression that was valid, practical, and effective for grade VII of Junior High School students, 2) obtain mathematical comic learning media on the subject of algebraic expression which was valid, practical, and effective for grade VII of Junior High School students. The development model was using a modification of 4-D development model from Thiagarajan, Dorothy S. Semmel, and Melvyn I. Semmel became a 3-D development model. The procedure of this development consisted of three stages, namely 1) define, 2) design, and 3) develop. The results of this study were 1) The process of developing comic learning media that was valid, practical and effective was found. 2) The mathematical comic learning media products on the subject of algebraic expression that was valid. From the validity data analysis, a validity of learning media score is 3,3 , lesson plans obtain a validity of lesson plan score is 3,66. a validity of knowledge assessment instrument score is 3,46, a validity of the students' responses questionnaire score is 3,84. 3) The mathematical comic learning media products on the subject of algebraic expression was practical with practicality score is 3.3214 and 4) The mathematical comic learning media products on the subject of algebraic expression was effective were obtained. The products produced were two comic books with the subject of introduction to algebraic expressions and addition, subtraction and multiplication operations of algebraic expressions. The subject was presented in the form of stories with illustrations of black-and-white images and was equipped with practice questions.