The four goals of this project are outlined in some detail. First, a unit programed for self-instruction in nursing, entitled "An Introduction to Radiation Therapy" was revised and rewritten on the basis of knowledge gained from controlled use. The revised unit took less time, showed a decreased error rate and indicated greater learning. A second goal was to use the unit in two alternate ways within the basic nursing curriculum. It was tested successfully with one group as a preparation for a brief clinical experience in the radiation therapy department and with another group as an out-of-class assignment during formal classes in the nursing care of the individual with cancer. A third goal was to validate the material in other nursing programs, and the two trials are described. The processing details are also given for the development and testing of a second unit "An Introduction to Cancer Nursing," which was the fourth project goal. (JK)