This is the final report describing a supervised program of self-instruction in critical languages at the undergraduate level. The project was begun at a single college in 1963, was expanded to a statewide basis in 1966, and was again enlarged to run on a national basis in 1969. In 1971-72, over 1,000 students were enrolled in these programs at about 45 colleges across the country. The primary method employed in this project was the initiation of self-instructional programs on individual college campuses in order to examine such factors in self-instructional language learning as motivation and aptitude, suitability of existing materials, the roles played by campus coordinators, tutors, and outside examiners, and problems of interinstitutional cooperation in furthering this method. The basic conclusion was that independent study of critical languages is a financially and academically viable means for the small college as well as the large university to broaden significantly their offerings of foreign languages to the carefully selected and well-motivated student. A major goal of the project was to determine the feasibility of "institutionalizing" the overall program structure to assure continuation of individual programs; this goal was partly achieved with the formation of a National Association for Self-Instructional Language Programs. Appendices contain: program data for 1969-70, 1970-71, and 1971-72; a guide to a film on self-instruction; reports on two conferences on independent language study; a checklist for CLP evaluators; and copy for the back cover of the SILP Handbook. (Author/AM)