Helmi R, Yumiati, Wahyuningrum E. Google Sites-Mediated Problem-Based Learning: Effects on Students’ Conceptual Understanding and Mathematical Self-Efficacy. indonesian. technology. and. education. j. [Internet]. 2026 Oct. 24 [cited 2026 Nov. 11];4(3):12-33. Available from: https://journal.diginus.id/ITEJ/article/view/2400