Syafruddin P. Improving student achievement first class v elementary school no. 21 kapuh in first subjects ips on natural appearance using interactive learning model semester academic year 2016/2017. JIPS [Internet]. 2018 Oct. 27 [cited 2024 Dec. 22];1(2):14-21. Available from: https://e-journal.sastra-unes.com/index.php/JIPS/article/view/243