My middle school science class is a mess, and now that its the end of the year, it's getting worse. Half of them can't handle a moment of free time without getting themselves in trouble or hurting one another accidently. I can't give them more work because they struggle to complete the small amount of work I give them. I don't have an aide and there are 12 of them. I can't have them play games because it will distract the other students. HELP!