The Theory Books of the DAVID CARR GLOVER PIANO LIBRARY are written in "programmed instruction" style, one of the most effective means of learning in modern education. Programmed instruction is based on three generally accepted principles: 1. The material is presented in small steps called "frames." 2. The student makes an immediate written response to each frame so that his learning is constantly checked. 3. The student knows if his answer is correct. The Theory Books are written for the Prepar