Return to Article Details INDIVIDUALIZED INSTRUCTION AND LEARNING (Editors: Maclan Mohan and Ronald E. Hull); THE KELLER PLAN HANDBOOK: ESSAYS ON A PERSONALIZED SYSTEM OF INSTRUCTION (Authors: Fred S. Keller and J. Gilmour Sherman); PSI PERSONALIZED SYSTEM OF INSTRUCTION: 41 GERMINAL PAPERS (Editor: J. Gilmour Sherman) Download Download PDF