Investigated was an inservice training program in elementary school science (grades 1, 2, and 3) designed to increase teachers' achievement of relevant performance skills. Attainment criteria were (1) a change in the teachers' verbal classroom behavior, and (2) an increase in the teachers' scientific knowledge and understanding of science. A…

To test the hypothesis that if given a curriculum designed to develop cognitive functioning and taught by strategies designed to develop cognitive skills, students would then master more sophisticated symbolic thought earlier and more systematically than could be expected if this development had been left to the accidents of experience or if…