Title III of the National Defense Education Act of 1958 authorized a program of financial assistance of State educational agencies for projects of local educational agencies for the acquisition of laboratory or other special equipment needed in the teaching of modern foreign languages and for minor remodeling of laboratory or other space to be used for such equipment. Loans to nonprofit, private schools were authorized for the same types of projects. Under the provisions of this Act hundreds of schools have already installed language laboratories. The installations vary greatly, from simple listening corners having a single playback machine to fully equipped laboratories in which each pupil has a semiprivate booth complete with microphone, activated earphones, and facilities for recording and playing back his imitation of the model. Great variation is to be expected because of the diversity in the school systems and the autonomy of the local district as well as the wide range of teaching situations in foreign language classes. This state of newness, variety, and rapid growth of language laboratory facilities clearly indicates, however, a need to explore with considered judgment the relationship of equipment functions to language learning activities. The purpose of this bulletin is to offer teachers and administrators some practical guidelines for planning a language laboratory and for obtaining maximum educational value from electromechanical equipment selected. Language laboratory terminology, glossaries of language laboratory expressions and terms, and a list of useful references are included. (Contains 9 footnotes.) [Best copy available has been provided.]