The classroom setup has to be changed so as to not let these kids interact with each other. They should all be in cubicles with tele-presence, or those old Australian prison choir boxes where you can see forward, but not to the side.
Why even bother sending them to school. Apprentice them to machine shops, and like businesses, before they are set in their evil ways. Do it old style, where the young people are housed, fed, clothed, etc., by the Master Craftsman, and they work very hard, and a stipend. Give the businesses the money the schools are spending. Send a very big, very mean teacher round a few hours a week to ensure the students and read, write, and perform basic arithmetic and have some knowledge of our history and constitution; making it clear if they want their stipend they will behave in the classroom and learn something.