Dian Putri Wulandari, Abd Qohar
Learning media is a tool to deliver material to students during the learning process. This research aims to develop manipulative learning media on direct and inverse proportion subject in Class VII. This developed media was called as Stackoper. Development method is carried out using the Smaldino's development model. The process of developing instructional media has three stages, namely, planning, design, and development. The media was tested through peer teaching to seventh grade of Hidayatul Mubtadiin Junior High School. The media was subjected to 35 students who were taking direct and inverse proportion learning material. Based on data analysis, the results obtained are (1) the results of the validity test of learning media included in the valid criteria by obtaining an average score of 3.55 and the category is quite valid and (2) the results of the effectiveness test are obtained through the observation sheet of the students' effectiveness with the average score averaging 3.5 including the category is quite valid. Based on the two results of the trial, research on the development of Stackoper manipulative learning media on comparative material worth and reversing grade VII grades of SMP produces a valid and effective media. © 2022 Author(s).
Mathemathics Department, Universitas Negeri Malang, Jl. Semarang No. 5, Malang, Indonesia