Quality in education relates to the quality of the work undertaken by a teacher, which has significant effects upon his or her pupils or students. Further, those who pay teachers' salaries, whether through taxes or through school fees, wish to be assured that they are receiving value for money. Ways to measure the quality of work of individual teachers, of schools, or of education systems as a whole, are therefore often sought.
In most countries, teacher salary is not related to the perceived quality of his or her work. Some, however, have systems to identify the 'best-performing' teachers, and increase their remuneration accordingly. Elsewhere, assessments of teacher performance may be undertaken with a view to identifying teachers' needs for additional training or development, or, in extreme cases, to identify those teachers that should be required to leave the profession. In some countries, teachers are required to re-apply periodically for their license to teach, and in so doing, to prove that they still have the requisite skills.
Feedback on the performance of teachers is integral to many state and private education procedures, but takes many different forms. The 'no fault' approach is believed by some to be satisfactory, as weaknesses are carefully identified, assessed and then addressed through the provision of in