Research studies on instructional procedures in elementary school science are reviewed for the period 1960-68. Proposed is a model of an instructional sequence which is used as a reference point for analyzing the studies. Areas discussed include audiovisual aids, comparative studies, ability grouping, use of reading materials, programed instruction, individualized instruction, concept development, critical thinking, problem solving, and inquiry in science. Some 15 conclusions are stated which emerge from the studies reviewed. A 132-item bibliography is included. (GR)