29 November 2019

By John Jerrim

School league tables produced every year by the Department for Education currently use a single year of test score data in the headline measure. Based upon how a school’s most recent cohort of Year 11’s performed on their GCSEs, schools get labelled with terms such as “above” and “below” average.

This is not a smart thing to do. It would be much better to use the average performance of a school across multiple years instead.

This blog recaps the reasons why – and then suggests how this could be done.

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