Oku, E. 2026. Perceived Oral Communication Skills and Classroom Participation of Introverted Senior High School Students in Communicative Language Teaching (CLT) Activities: Basis for a Quiet-Learner CLT Program. International Journal of Sustainability and Advanced Integrated Research. 2, 2 (Jun. 2026), 3549–3565. DOI:https://doi.org/10.65339/ijsair.V2.I2.608.