Charoenthong, N. ., and A. . Poonputta. “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, vol. 8, no. 5, July 2025, pp. 277-85, doi:10.53894/ijirss.v8i5.8608.