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Quintiles (part 2): How to be above and below average at the same time

By James Pembroke / October 18, 2019 / 0 Comments

How you can you be above average and yet below average? It depends on what average we’re talking about. The mean? The median? The mode? In fact, in the world of school performance measures, what we commonly refer to as average is not an average at all; it is simply the national figure. For example,…

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Don’t panic about quintiles

By James Pembroke / October 17, 2019 / 0 Comments

Ofsted have been placing schools into quintiles – bands comprising 20% of schools: bottom 20%, middle 20%, top 20% etc – in the IDSR for a few years now. Initially it was just based on progress scores but this year they have expanded the approach to include attainment at EYFS, KS1, KS2 and in phonics.…

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