A study was conducted to determine which of five tests used in the Early Prevention of School Failure (EPSF) program were the best predictors of student academic success at the end of first grade. The tests, which were administered upon children's entrance to kindergarten, were the Peabody Picture Vocabulary Test (PPVT), the Preschool Language Scale (PLS), the Visual-Motor Integration Test (VMI), the House-Tree-Person Test (HTP), and the Motor Activity Scale (MAS). These tests were the independent or predictor variables and were compared approximately 2 years later to scores of subtests from the Iowa Test of Basic Skills (ITBS). The five ITBS subsections considered were the vocabulary, reading, total language, work study skills, and total mathematics subsections. Subjects were 137 kindergarten children. Findings established that four of the five tests significantly predicted students' academic success: the PPVT, the PLS, the HTP, and the VMI. Children who scored low on these tests tended to score low on sections of the ITBS. (Author/RH)