Hard to watch this... http://thegrio.com/2015/11/02/students-bully-harass-teacher-classroom-video/ Savage animals with no morals, no conscience. Didnt see this story anywhere on the liberal controlled mainstream media.
Talk to teachers and they will tell you it's common. The administrators are afraid to expel them because then the Department of Education or Justice Department is on their case for disparate rates of expulsion. Better to ruin the learning environment for everyone else.