M. Tumarar, R. A. Najoan, and D. T. Tarusu, “THE IMPLEMENTATION OF THE PROJECT-BASED LEARNING MODEL TO IMPROVE LEARNING OUTCOMES ON PLANE FIGURE CONCEPTS AMONG THIRD-GRADE STUDENTS AT SD GMIM PELELOAN”, SJIIPS, vol. 15, no. 2, pp. 3493–3501, Jun. 2026.