THE EFFECT OF CLASS MANAGEMENT ON THE QUALITY OF LEARNING AND STUDENT ACHIEVEMENT IN GRADES 1&2 OF MI DARUN NAJAH KEMAMANG BALEN BOJONEGORO. jmpi [Internet]. 2026 Feb. 2 [cited 2026 Oct. 2];2(1). Available from: https://ejournal.attanwirbjn.ac.id/index.php/jmpi/article/view/123