The purpose of this study was to compare two instruments for screening preschool children for potential learning problems. The two instruments used were the Metropolitan Readiness Tests (MRT) and the Wizard of Oz Preschool Preliminary Screening Program. The children tested on both measures were members of a self-contained kindergarten class. MRT testing was done in small groups by the teacher and the screening by the author and two trained volunteers. The children were screened individually for motor, visual, auditory and language competencies. Those falling below recommended scores were referred for further evaluation. The computerized comparison of the raw scores on the two instruments showed a correlation coefficient of 0.9075, with a 0.005 level of significance (N=23) using Pearson's Product Moment. Numerous recent studies have shown the MRT to be a valid predictor of future learning success or failure. Thus, the Preliminary Screening is also a valid test. The four appendixes to the report provide the following: A. tables of tests scores; B. A Preliminary Screening Program to Identify Functioning Strengths and Weaknesses in Preschool Children; C. Formula for Pearson's Product Moment Correlation Coefficient; and D. Glossary. (Author/DB)