Lola Widia Sari Nasution, & Sujarwo. (2023). Improving Student Learning Outcomes in Theme 2 Always Saving Energy Through Problem Based Learning Models Assisted by Audio Visual Media in Class IV SD IT Darussalam Deli Tua. International Journal of Educational Research Excellence, 2(2), 191–196. https://doi.org/10.55299/ijere.v2i2.463