THE LANGUAGE LABORATORY IS ESSENTIALLY AN AUDIOVISUAL AID WHICH NOT ONLY STORES INFORMATION, BUT ALLOWS THE STUDENT TO CONTROL RATE OF PRESENTATION, CONTINUALLY EVALUATES THE STUDENT'S PERFORMANCE, AND APPRAISES HIS ACHIEVEMENT. THE EFFECTIVE PERFORMANCE OF A TEACHING MACHINE DEPENDS HEAVILY ON THE ORGANIZATION OF MATERIAL STORED IN IT, WHICH IN TURN DEPENDS ON THE SKILL OF THE TEACHER WHO DOES THE PROGRAMING. THE MACHINE MECHANICALLY STORES, DISTRIBUTES, AND CORRECTS THE COURSE MATERIAL BUT IT IS THE TEACHER WHO PROVIDES THE MATERIAL. FOREIGN LANGUAGE MATERIAL USED IN LABORATORY TAPES SHOULD BE RECORDED BY A NATIVE SPEAKER, THEREBY GIVING THE STUDENT A PERFECT MODEL TO IMITATE. WHEN PRONUNCIATION IS BEING TAUGHT, THE LEARNING CYCLE SHOULD BE COMPOSED OF THE READING BY A NATIVE SPEAKER IN THE FOREIGN LANGUAGE, THE STUDENT'S IMITATION, AND THE EVALUATION OF STUDENT'S IMITATION. IN THE TEACHING OF GRAMMATICAL STRUCTURE, THE LEARNING CYCLE SHOULD BE COMPOSED OF THE READING OF MATERIAL, THE QUESTIONS ON MATERIAL, THE STUDENT'S ANSWER, AND THE VERIFICATION OR DENIAL. TO PROPERLY PREPARE MATERIAL FOR THE LANGUAGE LABORATORY, THE INSTRUCTOR IS URGED TO BECOME ACQUAINTED WITH THE PRINCIPLES OF MODERN LINGUISTICS AND TO REALIZE THAT THE EXERCISES IN MOST TEXTBOOKS GENERALLY PROVE UNSUITABLE FOR THE LABORATORY. THE GENERAL PRACTICE OF TODAY IS TO MAKE ONE OF THE FIVE LANGUAGE CLASSES EACH WEEK A LABORATORY CLASS, WITH COMPULSORY LABORATORY ATTENDANCE. OCCASIONAL BREAKS DURING THE LABORATORY CLASS ARE DESIRABLE. RECORDED LESSONS CAN BE DESIGNED FOR A FULL PERIOD OR HALF PERIOD, ALLOWING TIME FOR A COMPLETE REPEAT OR TEACHER COMMENT. SAMPLE LESSONS FOR EACH ARE INCLUDED.