The Wayne County Pre-Reading Program for Preventing Reading Failure is an individually, diagnostically prescribed, perceptual-cognitive-linguistic development program. The program utilizes the largest compilation of prescriptively coded, reading readiness materials to be assigned prior to and concurrent with first-year reading instruction. The Wayne County Pre-Reading Test's eight subtests determined the assignment of appropriate materials, lessons, and games. The deHirsch Predictive Index, on which the Pre-Reading Test was patterned, was also given. The first graders in three experimental and three matched control schools were sampled and compared on reading achievement at the end of the first grade with standardized reading tests. Factor analysis was used to reduce the number of teacher and classroom variables. The hypothesis that the Wayne County Pre-Reading Program would increase reading achievement at the end of the first grade was confirmed. The Wayne County Pre-Reading Test with the Self-Concept and Motivation Inventory (SCAMIN) exceeded the predictability of the deHirsch Predictive Index. All of the subtests of the Pre-Reading Test were significant contributors to the regression equations except Categories. Word Recognition I and II, Word Matching, Word Reproduction, and Reversals were the highest and most consistent predictors along with Achievement from SCAMIN. Tables of data, sample tests, and references are included. (AL)