None.

Children witness a drive-by shooting (offscreen, implied). A child is beaten down twice by gang members (offscreen, implied).

Several trash-talking students talk about kicking/beating their opponents' asses.

A child's mother is said to be a drug user rousted in a crack house bust. Later, she is shown high with her boyfriend in the presence of her child. Eventually, the child confronts her about her drug use.

Children witness a drive-by shooting (offscreen, implied). A child is bullied by gang members and later beaten down twice (offscreen, implied). A child visits his father in prison.