Adya Falefi, F. and Puranta, H. 2026. Two-Dimensional Visualization of Solid Expansion Using Spyder as a Physics Learning Medium in Secondary Schools. Kasuari: Physics Education Journal (KPEJ). 9, 1 (Jun. 2026), 290–302. DOI:https://doi.org/10.37891/kpej.v9i1.1180.