Vol. 2 No. 1 (2025): The Effectiveness Of Instructional Medium On Mathematics Achievement Of Senior High School Students In Sulu

This study assessed the effect of instructional medium on mathematics achievement among Grade 11 students at Sulu State College. A quasi-experimental research design was applied, involving a purposive sample of 30 students equally divided into control and experimental groups. The control group received instruction solely in English, while the experimental group was taught using English supplemented with the local Sinug dialect. Both groups were...