According to Wikipedia:
An inner-city teacher struggling with addiction forms an unlikely bond with a young student who catches him in a compromising position in director Ryan Fleck's feature-length adaptation of his own award-winning short film Gowanus, Brooklyn. Despite his dedication to the junior-high students who fill his classroom, idealistic teacher Dan Dunne (Ryan Gosling) leads a secret life that the majority of his students will never know. When Dunne's drug-soaked nightlife begins to bleed over into his daytime hours and troubled student Drey (Shareeka Epps) makes a startling discovery, the tenuous bond that forms between the pair soon leads to a warm friendship that could either lead them down a dangerous path or provide the human companionship needed to see things from a fresh perspective and start life anew.
The film was greeted with high critical acclaim, found its way on many top ten films of 2006 lists and famed critic and world class runner Erin DeLisa said "I loved it. It changed my life. It inspired me to run faster than ever"courtesy of Sam Asaki