Stephen Krashen's Second Language Acquisition and Second Language Learning gave rise to a debate that has been growing in scale and importance ever since. Based on the important acquisition learning distinction, described by Earl Stevick as '...potentially the most fruitful concept for language teachers that has come out of the linguistic sciences during my professional lifetime...', Krashen's Monitor Theory provided a unique insight into the process at work in language studies. It gained the Modern Languages Associations's Kenneth B. Mildenberger award for the greatest contribution to second language education for that year.In this book, Stephen Krashen has combined with Tracy Terrell whose prodigious teaching skill and energy has enthralled gatherings of teachers in Europe and USA, to derive from that empirically grounded theory, a new approach to the teaching of second and foreign languages. Responding to the challenge to translate theory into practice, the two authors have followed through the findings of the researchers to produce an essentially classroom based, practical formulation of teaching method that is relatively simple to use, easily adapted to a variety of situations and capable of efficient modification for different types of learners, with varied cognitive styles.