Detachment

Detachment movie synopsis:  Detachment is a chronicle of three weeks in the lives of several high school teachers, administrators and students through the eyes of a substitute teacher named Henry Barthes  (Adrien Brody). Henry's method of imparting vital knowledge to his temporary students is interrupted by the arrival of three women in his life. A perfect profession for one seeking to hide out in the open. One day Henry arrives at his next assignment. Upon his entry into this particular school, a secret world of emotion is awakened within him by three women. A girl named Meredith in his first period. A fellow teacher Ms. Madison, and a street hooker named Erica, whom Henry has personally granted brief shelter from the streets. Each one of these women, like Henry, are in a life and death struggle to find beauty in a seemingly vicious and loveless world.

Wikipedia: Detachment
Official movie site: Detachment
Check out the trailer below!