Powell, William R. Teacher self-supervision : why teacher evaluation has failed and what we can do about it / by William Powell and Ochan Kusuma-Powell. - 150 pages ; 24 cm. - World class schools series . - World class schools series. . Includes bibliographical references. ISBN: 9781909717671 (paperback) Subjects--Topical Terms: Teachers--Self-rating of.Teachers--Rating of. Dewey Class. No.: 371.144 / POW 2015