Adya Falefi, Farel, and Himawan Puranta. “Two-Dimensional Visualization of Solid Expansion Using Spyder As a Physics Learning Medium in Secondary Schools”. Kasuari: Physics Education Journal (KPEJ), vol. 9, no. 1, June 2026, pp. 290-02, doi:10.37891/kpej.v9i1.1180.