“Problem Based Learning Strengthens Tolerance And Moral Values In Elementary Students: Pembelajaran Berbasis Masalah Memperkuat Toleransi Dan Nilai Moral Siswa Sekolah Dasar” (2026) Indonesian Journal of Education Methods Development, 21(4), p. 10.21070/ijemd.v21i4.1172. doi:10.21070/ijemd.v21i4.1172.