Stats on 140,000 secondary school teachers across the country have been released by Education Secretary Michael Gove's new performance measure, the EBacc. It shows almost a million children are taught by a maths teacher who doesn't have more than an A-level in the subject.
In science and humanities, over 28 of physics teachers don't have a degree in their chosen subject.
In fact, only biology has a high proportion, 92%, who are degree level educated in the subject they teach.
A Department of Education spokesperson said they were struggling to get graduates into teaching core subjects: 'It's clear that the leading systems are built on teachers with expert, specialist subject knowledge.
'We've struggled to attract enough graduates in shortage subjects like physics, chemistry and maths for a long time. That's why we're taking radical steps to toughen up recruitment and training.
'We are going to overhaul professional development so existing teachers keep their skills and knowledge up to scratch.'
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