The last half of a course in subject indexing for the Educational Resources Information Center (ERIC) system is presented in this volume. The demonstration of indexing techniques, lesson 3, uses a typical document (given in full in an appendix in volume 1) to show how indexing concepts are chosen in practice and converted into terms contained in the ERIC Thesaurus or into new terms to be considered for inclusion in the thesarus. The use of a form for help in selecting indexing terms is also discussed. In the final lesson, number 4, two more documents are presented (also given in full in volume 1) and the process of indexing each is considered. The first two lessons are presented in volume 2 (LI 000 815) and the appendices in volume 1 (LI 000 814). (CM)