Children working alone is a common instructional strategy in some early childhood classrooms. According to foundational work by Johnson and Johnson (1986), however, cooperative teams employ higher levels of thought and retain information longer than children who work individually. Children engage in discussion, take responsibility for their…

This brief describes the findings of a study that tested preschoolers' executive function skills after participating in a program designed to enhance them vs. a standard curriculum. A total of 147 5-year-olds in their second year of preschool from a lower-income, urban school district participated in this study. The preschoolers were in 18…