Kigo, Josephat Kariru Effect of science process skills advance organizer on secondary school physics students' performance and motivation in electric circuits, Laikipia county, Kenya - Kabarak, Nakuru, Kenya Kabarak University 2017 - xx, 252 leaves Subjects--Topical Terms: Science process skillsPhysics--education LC Class. No.: LB 1585.5 / .K54 2017 c.1