This study is phase one of a 4-year project. It was aimed at examining the predictive validity of six preschool screening instruments on later academic achievement. The six instruments were (1) the Stanford-Binet Intelligence Test, (2) the Sprigle School Readiness Screening Test, (3) the Anton Brenner Developmental Gestalt Test of School Readiness, (4) the School Readiness Check List (the "Ready or Not" test), (5) the School Readiness Survey, and (6) the Child Study Unit Screening Scales. Informal ratings were also made by pediatricians. This phase of the project involved the initial screening of 100 preschoolers on the six tests. The tests were administered at two pediatric offices. The test results indicated that the instruments had a moderate to high relationship with the chronological age and mental age of the children and also a high correlation among themselves. However, some of the tests have a limited age range. Subsequent phases of the project will follow these subjects and compare their academic achievement to their screening test results. (WD)