A unit on animals was taught to 64 preschool children (44 in an experimental group and 20 in a control group). Children in the experimental group were taught nine major concepts over four levels of abstraction (designated as superordinate, intermediate, subordinate, or particular levels). Each concept was presented by means of an advance organizer…

Effects of Advance Organizer (AO) lessons presenting high-order math concepts relating to set building, matching and between sets, and counting objects within sets were evaluated for rural preschoolers in comparison to traditional instruction. A pre-test/post-test assessment indicated a significant sequential transfer effect from the AO lessons.…