This is exactly right. The dumb bint may have been disruptive but I've read nowhere that she was violent. So one class on remedial American History gets wasted putting up with her antics. It's not like kids actually learn anything in public schools anyway.
The officer's actions were completely unwarranted in this situation. He should be charged with assault.
he was fired - story I read had the girl now wearing a cast, bandages, etc.