D. A. Tan, C. C. Cordova, I. P. B. Saligumba, and L. L. B. Segumpan, “Development of Valid and Reliable Teacher-Made Tests for Grade 10 Mathematics”, IJEE, vol. 8, no. 1, pp. 62–83, Jan. 2019, Accessed: Nov. 06, 2026. [Online]. Available: https://ijee.org/ijee/article/view/439