Bev Vincent has a very interested essay on Stephenkingrevisited.com. A must read for the Stephen King enthusiast.
Stephen King wrote the first forty pages of the novel that would later be published as Rage in 1966, when he was a senior in high school. One source claims the original title Getting It On was inspired by the T. Rex song “Bang a Gong (Get It On).” The timing is right: In 1970, King found the incomplete manuscript of Getting It On “moldering away” in a box in the cellar of the house where he grew up, and he finished the novel in 1971, when that song was a hit.
In his essay “My High School Horrors,” King discusses his constant fear of being alone and not being able to connect with people or make friends while in high school, and of being afraid but not being able to tell people he was afraid. Rage arose from the same sense of being an outsider as did Carrie.