Lestari, D. and Dewi, P. 2021. The Impact of Synchronous Online Learning on Students Attainment in Maths. Jurnal Cendekia : Jurnal Pendidikan Matematika. 5, 2 (Apr. 2021), 867-879. DOI:https://doi.org/10.31004/cendekia.v5i2.408.