Interesting report in the Guardian on IFS research that recommends that school tests and examinations should be age adjusted. No doubt the usual rent a mouths will be wind-bagging about the pros and cons. Perhaps a little historical perspective is in order.
In 1893 the London Technical Education Board started offering scholarships to pupils who had attended LCC Board Schools, so that they could attend secondary schools. They were called Junior and Intermediate County Scholarships. To get one you had to sit an examination. Guess what? The test scores were age adjusted by month of birth.