The announcement that teachers will no longer be graded on individual lessons has proved popular in the UK. Richard Vaughan talks with Her Majesty's chief inspector Sir Michael Wilshaw to understand the thinking behind the change.
What is "bang for buck" in the context of school teaching? And does it matter? An "Efficiency Index" study by education consulting firm GEMS Education Solutions looked at PISA test results from 30 OECD countries and discovered "efficiency scores" were not necessarily related to spend per teacher. Joy Resmovits explains here.