This report is a follow-up study of the 1964-65 School Mathematics Study Group (SMSG) pilot program on mathematics learning of culturally disadvantaged children. In the pilot program, the School Mathematics Study Group was interested in determining the effectiveness of existing SMSG materials in developing materials for teachers emphasizing techniques for providing disadvantaged children with experiences necessary for the formation of fundamental concepts of arithmetic. A testing program was instituted to obtain objective data by which various comparisons might be made. The testing program was used to determine individual assessments in Visual Recognition, Visual Memory, Color Inventory, Geometric Shapes, Number Symbols, Counting Symbols, Counting, Place Value, Ordinal Numbers, Pairing, Equivalent Sets, Vocabulary, and Ordering and Classifying. An interpretation of the data obtained from the testing program is indicated for each of the above areas. (RP)