This unit of work is designed to provide the participant with an overview of the purposes, methods, and techniques for testing English as a Second Language (ESL) and practical classroom applications. Given the series of learning alternatives on testing that are presented in this module, the participant should be able to: (a) demonstrate knowledge of basic testing principles and concerns and (b) apply knowledge of principles to test evaluation and construction. Exercises are provided to serve as both pre- and post-assessments of the participant's mastery of the terminal objectives of the module. Learning alternatives are presented in outline form. The alternatives include various readings and the evaluation of 29 specific tests in terms of the needs of a particular group of second-language learners. (JA)