these are what i used last year,
The film 'Sleepers' <----- group of boys sent to a juvenile detention centre, they get abused there ( contrast to Sam in the farm) and when older they murder one of the guards of the correctional centre. Hence, the institution has not brought positive change...blah blah
THe song 'Another Brick in the Wall' by Pink Floyd <------- About the school institution and its control over kids and its purpose to convert them into functioning members of society...loss of individuality....
if u need any help with them feel free to ask