The Comprehensive School Mathematics Program (CSMP) materials presented here were in the process of development at the time of publication. It is noted that children generally classified as slow learners are, in many cases, pupils who have had unhappy experiences with learning. The instructional approach is designed to: (1) inspire pupils with a spirit of enthusiasm for mathematics and a curiosity about numbers and mathematical processes; (2) enrich student notions of numbers; and (3) give pupils a chance to make their own discoveries about numbers. There is a conviction expressed that paper and pencil should be banned in work which is done with slow learners in small groups. The use of calculators is promoted as a substitute. Activities presented are collected under: (1) Hand-Calculator; (2) Minicomputer Games; and (3) Detective Stories. (MP)