Cerveza RL, Lapinid MRC. The effects of gradual release of assistance instruction on students’ heuristics, confidence, and attitude toward independent problem-solving. j. math. educ. [Internet]. 2024 Jul. 30 [cited 2024 Dec. 21];15(3):771-92. Available from: http://jme.ejournal.unsri.ac.id/index.php/jme/article/view/675