Charoenthong, Nattawadee, and Apantee Poonputta. 2025. “The Effects of the GPAS 5 Steps and TPACK Model on Learning Achievement and Mathematical Connection Skills in Sequences and Series Among Grade 11 Students”. International Journal of Innovative Research and Scientific Studies 8 (5):277-85. https://doi.org/10.53894/ijirss.v8i5.8608.