Wajnryb, Ruth. Classroom observation tasks : a resource book for language teachers and trainers / by Ruth Wajnryb. - Cambridge, N.Y. : Cambridge University Press, 1992. - viii, 145 p. - Cambridge Teacher Training and Development. . Includes bibliographical references and index. The tasks--The learner--Language--Learning. ISBN: 0521407222 Subjects--Topical Terms: English language.