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 addresses assessment issues. An introductory chapter gives an overview of the guide and offers suggestions for identifying assessment needs for the language training program and for scheduling trainee assessment activities. The second chapter offers general information on planning assessment activities. The third chapter discusses forms of informal student assessment, including use of trainer logs, student self-assessment, simulations, individual conversations, community contact assignments, portfolios, and practice language proficiency interviews. The fourth chapter focuses on conducting the formal language proficiency interview, and answers frequently-asked questions about the test and tester training. (MSE)