Nainggolan DRM, Sudarman S, Subagio N. Application of LKPD Social Studies Based Collaborative Learning Model Structured Problem Solving Type in Improving the Completeness of Class VII Students’ Learning Outcomes at SMP Negeri 1 Tenggarong Seberang. escs [Internet]. 2022 Dec. 31 [cited 2026 Apr. 1];2(2):307-1. Available from: https://jurnal.fkip.unmul.ac.id/index.php/escs/article/view/1920