Ayu Fatimah, Bellaresa Hari Kristina, Defi Firawati, Deswara Bayu Pambagyo, Devita Septiana Anggraeni, Dhian Prasetyo Adjie, Zidni Elma Nafia and Syahrul Syah Sinaga 2026. Group-Based Differentiated Instruction Improves Guitar Chord Skills Among SMAN 3 Semarang Students. International Journal of Education, Vocational and Social Science . 5, 04 (Oct. 2026), 3029-3046. DOI:https://doi.org/10.63922/ijevss.v5i04.6813.