The Underclassman (2005)

Maverick cop Tracy "Tre" Stokes is about to get schooled in a whole new way of solving crime as he goes undercover at an elite private high school. A fast-talking, street-smart but baby-faced detective who's honed his renegade crime-fighting skills in urban L.A., Stokes has no clue what he's in for when he heads back to high school to infiltrate a group of ultra-rich, hyper-smart students under suspicion for murder. Cultures clash as Stokes' no-holds-barred style meets the ultimate in high school high-society. But soon Stokes finds himself getting closer to his killer and to passing Spanish and making the basketball team, as he works his way with tenacity into the "in" crowd and uncovers a dangerous ring of criminals.