Much has been made of the government's Prevent Strategy, part of which requires teachers and lecturers to monitor their students for potential extremism activity.
Concerns have been aired around what kind of behaviour is defined as "extremist", with teachers feeling they have been left to their own devices to decide, while others have said the strategy will alienate Muslims.
However, from the Prevent Strategy document itself, to Ofsted reports and Department for Education guides, the government has been issuing advisory notes on what constitutes "extremist" behaviour, and what traits teachers should be wary of, for a while. And it seems everything from friendships to typical teenage attributes is under scrutiny.