This article describes a Title III project which attempts to introduce principles of child development into teaching in the elementary school in a practical and comprehensive manner, using actual experiences from the classroom as examples. The strategies provide a general set of guidelines for approaching individual children based on emotional and developmental factors as well as academic ones; they emphasize the part feelings play in learning within the classroom. The authors feel that the total program has proven itself as: (1) an inexpensive, quick screening instrument; (2) an effective inservice teacher training program; and (3) a significant contribution to the efficient utilization of supportive services personnel such as psychiatrists, psychologists, guidance counselors, and speech and adaptive physical education therapists. References are included. (Author/SES)