Mary Myatt is a lead inspector for Ofsted, adviser, writer and trainer who blogs at MaryMyatt.com. She kindly agreed to write this blog for us after appearing at a panel at a joint Teach First & Teacher Development Trust event on Lesson Observation. You can see the vidoes here.
If there was any doubt about the inaccuracy of lesson observations, they were squarely squashed by Prof Robert Coe during the lesson observation debate organised by David Weston from the Teacher Development Trust and Sam Freedman from Teach First. It is not possible to judge accurately the quality of teaching from a twenty minutes lesson observation. So why are lessons graded?