SARAH MAULIDA, S.; BANUHARLI, S.; SAPARWADI, S.; NURSALI, N.; SANUARDI, S.; KARTIKA MURNI, R.; NURAINI, N. Optimizing Problem-Solving Skills in First Grade: A Project-Based Learning Model Enhanced by Lesson Study at Sekolah Dasar Unggulan Hamzanwadi . IJE : Interdisciplinary Journal of Education, [S. l.], v. 2, n. 1, p. 70–79, 2024. DOI: 10.61277/ije.v2i1.79. Disponível em: https://skillerindonesia.id/index.php/ije/article/view/79. Acesso em: 7 nov. 2025.