Samosir A, O. Brusa J, Aulia Nanda F, Sihombing C, Karo Karo R. THE IMPACT OF ONLINE LEARNING ON MATHEMATICS LEARNING OUTCOMES OF CLASS II STUDENTS OF SD NEGERI 191320 RAYA TONGAH. IHERT [Internet]. 2020 Dec. 31 [cited 2025 Jan. 5];2:159-72. Available from: http://proceeding.unefaconference.org/index.php/IHERT/article/view/23