What’s seven times nine? Quick, you’ve got six seconds to answer. This June, over 600,000 children in England in year four, aged eight and nine, will be expected to answer questions like this. They ...

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1 UMIT TIROL—Private University for Health Sciences and Health Technology, Institute for Psychology, EWZ 1, Hall in Tirol, Austria. 2 Mathematics Education Centre, Loughborough University, ...