Free teaching materials which will be available at least until 1973, which have been evaluated by accredited teachers, and which have direct bearing on curriculum are listed in this catalog. Individual items are grouped under appropriate subject headings by title or source, and a description of the item is included. In addition, the approximate grade or comprehension level, the number of copies which may be requested free of charge, and the organization sponsoring the item are provided for each entry. The organizations are listed at the end of the catalog with complete addresses. (SH)