The purpose of this study is to measure the average percentage of mathematics learning achievement of fifth-grade students when online learning was implemented and its impact when face-to-face learning was limited. The population in this study was 150 fifth-grade students in Tanah Bumbu Regency with the type of ex-post fact research. The data collection technique was in the form of a ... https://www.cuttingedgecutleryco.shop/product-category/book/