Teenagers in the UK are behind the rest of the world in maths and reading, a new report is expected to show.
The Organisation for Economic Co-Operation assesses the ability of 15-year-olds, with more than 510,000 pupils in 65 economies taking part in the latest study.
In the UK, around 12,600 pupils in 477 secondary schools sat the organisation's two-hour test in reading, maths and science.
Although the exact results are yet to be revealed, the Mail reports that when the figures are released tomorrow, it will show that the UK has 'simply stagnated' in four years.
Having seen the figures, Education Secretary Michael Gove said the results were a 'verdict on the last government' as Tory reforms to education had not yet taken effect.
In the last study by the OECD in 2009, Britain was found to have fallen behind countries such as Poland and Estonia for reading, having gone from 17th to 25th place. In maths, we fell from 24th to 28th position, and from 14th to 16th in science.
The publication of the number crunching tomorrow is expected to reveal we are still far behind countries such as China, South Korea and Singapore.
Britain's expected poor results in maths are said to be of particular concern, and will highlight the lack of teachers with degrees in the subject.