Sari EM, Putri RII. Development of Sharing Task and Jumping Task in Direct Proportion using Lesson Study and PBL. Int. J. Emerg. Math. Educ. [Internet]. 2020 Apr. 20 [cited 2024 Nov. 24];3(2):177-90. Available from: https://journal.uad.ac.id/index.php/IJEME/article/view/13865