This position paper on the measurement of achievement in language instruction contains nine articles by leading authorities. Three articles, written in German, cover: (1) testing: necessities and dangers, (2) supervision and evaluation of oral achievement in certification examinations, and (3) development of a higher level of an adult education language certificate for commerce and industry. The articles in English discuss language testing, measurement of oral communication, criterion-referenced testing, oral English testing, error analysis, and picture composition and oral-response tests. (RL)