Pollack, JordanEvett, MatthewHendler, James A.This paper provides an implementation, in Common Lisp, of an "epoch learning algorithm," a simple modification of the standard back-propagation algorithm. This implementation is not intended to be a general purpose, high powered back-propagation learning system. Rather, this paper seeks only to provide a simple implementation of a popular and easily understood connectionist learning algorithm. It is intended to be a, teaching tool for AI researchers wishing to familiarize themselves or their students with back-propagation in a language with which they are comfortable.en-USTechnical Report