Reviews three special-purpose forecasting methods (population-ratio techniques, Bell Telephone method, method of analogy, and multiple-factor method) and three methods of universal applicability (the cohort-survival, percentage- survival, and law-of-growth methods) to help administrators grasp enrollment forecasting technicalities. A comparison shows that the cohort-survival method consistently produced lower error rates for each five-year projection for median or mean error rates. (MLH)