ASCL, a secondary school leaders trade union, said extremism of any kind "has no place in education".
Speaking in the wake of allegations of a "Trojan Horse" takeover plot at Birmingham schools, ASCL General Secretary Brian Lightman said: "Where there is clear evidence of extremism by anyone connected with a school community, it is absolutely right that firm, appropriate action is taken.
“The top priority now must be the education of the young people ... It’s been a difficult time for Birmingham and it won’t be easy to rebuild bridges, but this must be the priority."
Michael Gove's assertion that new rules could force schools to actively promote "British values" has sent the Twittersphere into a frenzy.
Five schools investigated in the wake of "Trojan Horse" claims will be put in special measures, while a sixth with remain under sanctions.