Development of Gamification-Based Flipped Learning in Mathematics Learning as an Effort to Overcome Learning Obstacles. Indonesian Journal of Primary Education, [S. l.], v. 6, n. 1, p. 105–112, 2022. Disponível em: https://ejournal-tasikmalaya.upi.edu/ijpe/article/view/473. Acesso em: 12 nov. 2026.