An investigation of the relationship between participation in the Home Instruction for Parents of Preschool Youngsters (HIPPY) program and mothers' involvement in education at home and school, student school readiness in kindergarten, and student academic outcomes in third grade, with a comparison of HIPPY and non-HIPPY 5-year-olds in terms of enrollment rates in prekindergarten, attendance rates in kindergarten, and kindergarten retention, and a comparison of former HIPPY participants in third grade and non-former HIPPY students in terms of scores on state math and reading achievement tests, based on data from a longitudinal study of 2 north Texas HIPPY sites