Preschool teachers use the domino effect--standing dominos on end in rows and pushing one over--to examine how play contributes to children's acquisition of knowledge. Using diagrams, photos, and vignettes of children between the ages of 3 and 5 years, the authors demonstrate how children at different stages of development use physical knowledge…

Discusses methods for promoting cooperative learning among preschoolers and the history of these methods. Describes class projects and activities at Dai-ichi Preschool in Japan, which uses group and individual activities to build a classroom group that fosters children's growth and creativity and supports children's efforts. (BB)