One of a series of 18, this Child Development Associate (CDA) training module provides a guide to developing mathematical ability in preschool children. Objectives state that upon completion of the module the CDA trainee will be able to provide daily opportunities for math-concept development, provide problem solving activities, sequence math experiences from simple to complex, provide a mathematics center, plan, execute and evaluate at least five learning experiences in math, and execute and evaluate a minimum of five unplanned experiences for developing math concepts. Early sections of the module define terms and suggest a procedure by which trainees can evaluate their strengths and weaknesses. Subsequent chapters discuss the teacher's responsibility for mathematics in the preschool, teaching mathematics in the preschool, and learning activity development. Fourteen examples of learning activities and an observation guide for evaluating learning centers are provided for the CDA trainee. Supplemental reference books, pamphlets, children's books, and films are listed. (RH)