The instructional concept guide is part of a system developed for tutor training and support. It is primarily designed for volunteers, but it can also be adapted to the training of paraprofessional tutors for any type of adult literacy program. A key component in the system is the Tutor Support Library, consisting of Instructional Concept Guides (training and reference aids for tutors) and Functional Content Units (models for the practical application of tutoring skills). Guide Eleven provides information for agencies and individual tutors in selection and use of materials. The first two sections discuss in detail procedures involved in choosing materials for the literacy program and using materials in the program. The final section (74 pages) lists materials in the following categories: essential, useful (but not basic), desirable as an adjunct to a basic program, and late reviews. Titles, ordering information, Regional Adult Literacy Service Unit (RALSU) evaluate coding (for content, interest level, and reading level), and annotations are presented for each item. Unevaluated materials, references for teachers, and State-related program reports and publications are also listed. (Author/MS)