According to the South Bend Tribune, there's a good reason the teacher let the students roughhouse in class:
[T]he substitute lives in a local home for people with chronic mental illness. The residents have bedrooms, eat meals together and enter the community daily on their own. She moved into a home like this in 1999.
She says she was diagnosed with paranoia. At age 60, she also touts a master’s degree. She has experience teaching in the classroom ...
The student who shot the video -- most likely on a cell phone -- is suspended; the school principal wants him expelled. Cell phones are prohibited in middle school.