Our schools are falling behind the rest of the world – and every major party must share blame

Every three years, its Programme for International Student Assessment (PISA) publish test scores that provide the most widely recognised measure of how well pupils across the globe are performing in reading, mathematics and science.

Between 2006 and 2015, in the PISA test the UK has dropped from 16th to 22nd internationally on literacy, from 23rd to 27th on maths and from 13th to 15th on science.

All political parties are committed to spending more on education but they are ignoring the key question. Why is UK per head schooling so expensive and, at the same time, so ineffective compared to many other countries? This is the first educational question we should be asking politicians during the election campai