Christine Blower, the general secretary of the National Union of Teachers, says Education Secretary Michael Gove is "isolated" in his view that GCSEs should be replaced.
She said: "Michael Gove and the Coalition Government's position on examination reform is now surely untenable. The Education Secretary is totally isolated in his view that the English Baccalaureate Certificates are a suitable measure to replace GCSEs."
More top news
In an interview with The Sunday Telegraph David Cameron has set out a series of policies designed to appeal to traditional Tory voters.
Nick Clegg will attempt to win over the female electorate when he kicks off the Liberal Democrats' general election campaign later today.
Up to £140 billion of savings could be released when over 55-year-olds are allowed to cash in their pension pots from April 6th.