(1)
Ramadhani, A. O.; Nisa’, A. K.; Alimatulhana, N. .; Rizky, M.; Kusumawati, P. R. D. The Effect of the Problem-Based Learning (PBL) Model Combined With Laboratory Experiments on Students’ Level of Understanding of the Topic of Changes in the State of Matter in Elementary School. j.PrimerEdukasi 2026, 6, 80-87.