Based on a review of 335 research studies conducted in 1972-1987, the effectiveness of various methods, approaches, and techniques for teaching English as a Second Language in Thailand is analyzed. The information is presented in three sections: methods that worked; methods that did not work; and methods that appeared to work. In each section, the methods, approaches, and techniques are listed according to the skill area they target (listening, speaking, reading, or writing), with information given for each about the level(s) at which they were studied, learner achievement gains, and the study cited. A brief analysis is then provided for each skill area. It is concluded that the methods and approaches found to work consistently are based on the concepts and philosophy of programmed instruction, schema orientation, or task orientation. However, no single method, approach, or technique was found to be universally effective. (MSE)