@article{cris2026,
title = {Problem-Based Learning in Human Organ System Instruction: Effects on Senior High Students’ Understanding, HOTS, and Engagement},
author = {Cris Edison Villanueva},
journal = {Psychology and Education: A Multidisciplinary Journal},
volume = {61},
number = {1},
pages = {159-179},
year = {2026},
doi = {10.70838/pemj.610108},
}