My niece teaches modern languages at a secondary school in Herts. She is having to cope with similar, but not as extreme, bad behaviour from an 11 year old girl who disrupts the whole class. There are no sanctions except for exclusion which doesn't help the child. The head master is useless apparently. It is one of the Gove 'free' schools.
We wouldn't say boo to a goose in my time and respected our elders.