Why can’t we tell a good teacher through lesson observations?
No teacher is so good - or so bad - that he or she cannot improve. Dylan Wiliam The English education system is obsessed with ascertaining the quality of teachers. And what with the great and the good telling us that teacher quality is the most important ingredient in pupils' success then maybe it's small wonder. As Michael Barber says, "the quality of an education system cannot exceed the quality of its teachers." And taken in the round, assessing teacher quality and then working to develop teachers is an entirely laudable aim. Bizarrely though, many schools seem incapable of seeing beyond [...]