Andini R, Maulana H. Implementation of Active, Creative, Effective Learning, And Fun In Improving Results of Learning Mathematics Three-Dimensional Concepts. IMEIJ [Internet]. 2021 Apr. 30 [cited 2025 May 12];2(1):47-59. Available from: https://ejournal.indo-intellectual.id/index.php/imeij/article/view/43