Christine Blower, NUT general secretary, told BBC Radio 4's Today programme it was "a little disappointing" Mr Gove had written to Ofqual "without having had this discussion with the profession".
She said: "There is a lot to commend A-levels, but there is no harm done in having a look at them again.
"What we don't want is to have proposals put to us on a take it or leave it basis."
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Last minute preparations are going on at the Church of St Mary Magdalene where Princess Charlotte will be christened.
Princess Charlotte is being christened on Sunday at Sandringham in Norfolk in only her second public appearance since she was born.
Thunderstorms clear the North, leaving a dry and warm day with sunny spells.