This report presents initial findings of a field study which focused on the academic achievement and behavioral and social adjustment of 148 kindergarten children who entered first grade early. The study took place in Broward County, Florida, following implementation of the 1973 state legislation permitting early entrance into first grade for children who attained the age of 6 during the school year, attended kindergarten, and successfully passed a readiness test approved by the Florida State Board of Education. A first grade prereading test was used to screen early entry applicants in Broward County schools. In this study, early entrants were compared with (1) kindergarteners who qualified for early entry but whose parents elected to keep them in kindergarten, and (2) first graders who scored among the upper 20% in the county-wide distribution of prereading test scores. Groups were compared on achievement test scores, teacher ratings of behavior, and peer acceptance. Results indicate that early entrants into first grade will do well academically, but will be less self-reliant and less socially accepted by their peers than either their bright kindergarten counterparts or their bright first grade classmates. (ED)