Hery Setiyawan, Herfa Maulina Dewi Soewardini. Integrating Puzzles and STAD Model in Teaching Angle Measurement to Elementary School Third Graders: An Action Research Study. Ehdj [Internet]. 2023 Sep. 30 [cited 2026 Jul. 28];8(2):83-90. Available from: https://journal2.unusa.ac.id/index.php/EHDJ/article/view/5282