Chiarelott, Leigh Lenses on teaching : developing prespectives on classroom life / Leigh Chiarelott, Leonard Davidman, Kevin Ryan - 4th ed. - Belmont, CA : Thomson Wadsworth, 2006 - xiv, 239 ; 26 cm. ISBN: 0495091901 RM274.67 Subjects--Topical Terms: Observation (Educational method)TeachingTeachers--Training of.