Baylosis, Genevil V. Effectiveness of Strategic Intervention Materials (SIM) on the academic achievement of Grade 7 students in earth science : basis for lesson exemplars / Genevil V. Baylosis - vii, 100 leaves: illustrations; 28 cm. Thesis (MaEd) -- Includes bibliography Subjects--Topical Terms: Strategic Intervention Materials (SIM).Earth sciences--Study and teaching.Teachers--Training of.Academic achievement.