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The Silver Bullet Machine 

Manufacturing Company Limited 

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+44 (0) 1572 813 690

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June 21, 2019

Over the last few weeks, I've been working on a document that tells the full story about grade (un)reliability, including

*  why grade reliability matters

*  the problematic nature of the quest for the 'right' mark

*  the distinction between 'accuracy' and 'reliability'.....

October 28, 2018

For many months now, the website of Pearson, the owners of the edexcel examination board, has been boasting that “99.2% of our grades were accurate on results day”,  a claim Pearson have been using to boost their marketing.

This claim is wrong. And it is amazi...

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September 2, 2017

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