THE EFFECTIVENESS OF DISTANCE LEARNING IN SCIENCE STUDENTS DURING COVID-19 AT SMPN KECAMATAN KOTO XI TARUSAN, PESISIR SELATAN DISTRICT ON UNDERSTANDING STUDENT CONCEPTS. universe [Internet]. 2021 Dec. 30 [cited 2026 Aug. 14];2(2):204-12. Available from: http://universe.ppj.unp.ac.id/index.php/universe/article/view/108