This paper develops a rationale for individualization of instruction and after a brief discussion of two alternative approaches--diagnostic-prescriptive teaching and modularized instruction--promotes learning centers as a practical approach to such individualization. Learning centers are defined as compact, highly-structured sets of didactic materials which are organized to communicate specific information to a learner and which specify precisely what is to be learned, provide alternative multimedia approaches to learning, include evaluation, and encourage student initiative and self-discipline while allowing significant learner freedom. The TOASTE procedure, a mnemonic designed to assist curriculum and learning center developers, is specifically recommended. Details are provided concerning each of the procedure's six components: topic, objective, activities, strategies, time, and evaluation. Additional elements of successful learning centers are discussed, including an introduction to the center with instructions for its use, completeness in terms of the unbroken flow to minimize learner confusion, scheduling devices, task cards, record-keeping procedures, TOASTE formula, mobility, and sturdy construction. (LMM)