The guide is one section of a resource kit designed to assist Peace Corps language instruction coordinators in countries around the world in understanding the principles underlying second language learning and teaching and in organizing instructional programs. This section covers development of instructional materials. An introductory chapter provides an overview of the guide, techniques for identifying materials development needs, and a suggested schedule for materials development activities. The second chapter outlines methods for developing seven types of instructional materials: pre-departure materials; student textbooks; student workbooks; grammatical information; cross-cultural information; instructors' manuals; and other teaching materials. The final chapter discusses the logistics of materials development, including establishing a team, ensuring ongoing revision, using computers to work with text and pictures, and cue cards for the computer. (MSE)