The purpose of this study was to determine whether age differences affect students' academic achievement, and whether age differences affect students in low-income areas differently than those in mixed or higher-income areas. Student achievement data for grades 3, 7, and 11 in language arts and math were obtained from a variety of schools located…

Used hypothetical student profiles to investigate factors other than achievement that influence kindergarten teachers' retention decisions. Found that teachers were not more likely to recommend retention for boys, nor for children born in August, although the trend was to retain younger students. Teachers were more likely to retain children…