Christine Blower, leader of the National Union of Teachers has accused Education Secretary Michael Gove of "messing with the national curriculum" and challenged him to visit more state schools.
"We would like him to walk around a lot more state schools, not just free schools and academies that are state funded. He would see there are plenty places doing after school clubs, sport and drama," said Blower.
"It would also be a good idea if Michael Gove stopped messing about with national curriculum and allowed the kind of curriculum freedoms that exists in some schools to exist in all schools," she said.
Blower added that Gove was "absolutely wrong" on his suggestion that more testing in schools is needed and claimed his calls for more power and freedom for teachers' to discipline students implied that state schools are "chaotic".
More top news
Former Work and Pensions Secretary Iain Duncan Smith has David Cameron should remain prime minister even if Britain vote to leave the EU.
Tony Blair has said Leave campaigners are focusing on immigration "because they've lost comprehensively the debate on the economy".
NBA player Bryce Dejean-Jones has been shot dead after breaking into an apartment he believed to be his girlfriend's, according to police.