"Understanding Second Language Acquisition, second edition, represents a historic scholarly achievement and unique contribution to the teaching of languages. Writing for teachers and those preparing to become teachers, Rod Ellis provides the most comprehensive and balanced overview of the field of second language acquisition available today. Theoretically and linguistically sophisticated, the text seeks to provide teachers with a ?basis for making pedagogical
decisions in a principled way.? This edition contains new chapters on social and cognitive aspects of the field as well as on explicit and implicit instruction. Ellis has contributed to the preparation of generations of modern language teachers; the second edition will ensure that this vital resource will
now meet the needs of a new generation."