The UK government has ordered English schools not to use resources from organisations which have expressed a desire to end capitalism.
On Thursday the Department for Education issued guidance for teachers which categorised anti-capitalism as an "extreme political stance" on a par with opposing free speech, antisemitism and endorsing illegal activity.
"Schools should not under any circumstances use resources produced by organisations that take extreme political stances on matters," it said.
"This is the case even if the material itself is not extreme as the use of it could imply endorsement or support of the organisation".
Examples of such content included "a publicly stated desire to abolish or overthrow democracy, capitalism or to end free and fair elections".
Former shadow Chancellor John McDonell told The Guardian the measures symbolise growing "authoritarianism" within the Conservative government
"It will be illegal to refer to large tracts of British history and politics including the history of British socialism, the Labour Party and trade unionism, all of which have at different times advocated the abolition of capitalism," he said.
But the Minister for School Standards has defended the guidance. saying it will give schools the rolls to teach in an age appropriate way.
"These materials should give schools the confidence to construct a curriculum that reflects diversity of views and backgrounds, whilst fostering all pupils' respect for others, understanding of healthy relationships, and ability to look after their own wellbeing," said Nick Gibb.
