Fast Times At Ridgemont High (1982)

Cameron Crowe went undercover as a journalist at a California high school, where the students gave him their opinion on their favorite subjects: sex, drugs, and rock music.  First there's Brad Hamilton, the big man on campus who appears to have everything made.  His 15 year old sister Stacy, an innocent high school freshman, gets plenty of bad advice from the sexually outspoken senior Linda on how to lose her virginity.  Finally, the stoner Jeff Spicolli, who aspires of becoming a famous surfer, clashes with his firm history teacher Mr. Hand, who is convinced that everyone is on dope.  Directed by Amy Heckerling.  Starring Jennifer Jason Leigh (Stacy), Sean Penn (Jeff), Phoebe Cates (Linda), and Judge Reinhold (Brad).