FOREIGN LANGUAGE PROFICIENCY TESTS OF THE MODERN LANGUAGE ASSOCATION WERE USED TO DETERMINE THE DEGREE OF IMPROVEMENT ACHIEVED BY 2,300 FOREIGN LANGUAGE TEACHERS WHO RECEIVED ADVANCED TRAINING IN THE 1966 NDEA SUMMER FOREIGN LANGUAGE INSTITUTES. TEACHERS OF FRENCH, GERMAN, ITALIAN, RUSSIAN, AND SPANISH IN 52 INSTITUTES WERE TESTED AT THE BEGINNING…