Most evaluations of teacher performance are brief, superficial, pro forma affairs involving a few moments of classroom observation every year or two followed by the completion of required evaluation forms. Not surprisingly, much of what has been written about teacher evaluation over the past decade reflects the dissatisfaction of teachers, the frustration of administrators, and the confusion of all parties as to the proper purposes for and methods of teacher evaluation. In this long-awaited book, Richard J. Stiggins and Daniel L. Duke approach teacher evaluation from a positive perspective. They present the results of three unique studies from over a three-year period, designed to uncover the inherent problems in current evaluation practices and find potential solutions to those problems.