An after-school tutorial program in which high school students assisted failing elementary school children with reading and homework 2-4 hours a week is described. The children, grades 3-6, were from low-income families, many from minority groups, and were taught in nine centers staffed by a master teacher and several tutors. The program began in February 1963 and operated in summer as well as during the school year until 1967. Evaluation of the 1963-64 school year compared 410 pupils with 185 control pupils on the basis of scores on the New York Tests of Growth in Reading, Level C, Form 1. Those pupils who were tutored 4 hours a week made significant gains over the control group, but the complete experimental group did not differ significantly from the control group. The 240 tutors, tested with alternate forms of the Advanced Level of the Iowa Silent Reading Tests, averaged 3-4 years of reading achievement gain. Analyses of classroom grades, pupil attitudes, tutorial academic averages, and tutorial attitudes were not conclusive. Total cost of the program for the 1963-64 school year was $151,700. (MD)