PENGEMBANGAN BAHAN AJAR MATEMATIKA DARING UNTUK MENINGKATKAN KEMAMPUAN PEMECAHAN MASALAH
The objectives of this study were (1) to develop online-based mathematics teaching materials for distance learning in the pandemic era, and (2) to determine the level of validation of the development of online-based mathematics teaching materials based on expert validation tests. This R&D research uses the ADDIE model which consists of analysis, design, development, implementation, and evaluation. The subjects of this study were class teachers and 5th grade students of SD Negeri Plumutan, Bancak, Semarang Regency. The results of this study are (1) there are five stages in the development of online-based mathematics teaching materials, namely making indicators, making learning objectives, collecting mathematics learning materials for cube and block volume materials, compiling materials in the form of LKPD, making Weebly Websites, and preparing lesson plans. (2) based on the validation test which includes material experts get a percentage of 85% with the criteria of "very good", teaching materials experts get a percentage of 90% with the criteria of "very good", and material experts get a percentage of 75% with the criteria of "good".