Purba E, Saragi D, Matondang Z. DEVELOPMENT OF CONTEXTUAL TEACHING LEARNING (CTL) LEARNING MODEL BASED ON BLENDED LEARNING PPKn LEARNING IN CLASS IV SDN 060901 MEDAN POLONIA. SIJEL [Internet]. 2022May9 [cited 2026Aug.3];2(2):272-93. Available from: https://www.sijel-journal.sensei-journal.com/jbo/article/view/81