The School District of Jennings, Missouri, undertook a study of the effectiveness of grouping on academic achievement in kindergarten. It was hypothesized that grouping children according to developmental lags would be beneficial to the subjects in terms of their academic and personal development; that the curricula would be partially responsible…

The kindergarten program of Tucson, Arizona's Sunnyside Unified School District aims to provide young children with opportunities to develop strong oral language skills, basic problem-solving abilities, fine and gross motor skills, and feelings of confidence and joy as a learner. In its 10 major sections, this color-coded kindergarten curriculum…