Teaching Trigonometry Using Khan Academy Application

This study determined the effectiveness of the Khan Academy application as a primary instructional material in teaching Trigonometry, specifically the Law of Sines, Law of Cosines, and Oblique Triangles, among Grade 9 students at Aloran Trade High School during the School Year 2025–2026. Anchored on Bloom’s Mastery Learning Model and supported by the concepts of immediate feedback and the Input-Process-Output (IPO) Model, the study utilized a quasi-experimental non-randomized control group pre-t