Dale Norbert is a student in Carrie. He appeared in the novel and in the first film.
In the novel, Dale Norbert is one of Carrie White's classmates, who might have tormented her. Dale attended the prom, but during the mayhem, his fingers got slammed on by the doors, causing them to bleed. Dale died of blood loss at the prom.
In the movie, Dale Norbert is a minor character in Carrie, he appeared as Mary Lila Grace's date. They were both nominated for prom king and queen, but they both lose to Carrie and Tommy. When Carrie was leaving the inferno prom, Dale and Mary can be seen running across in front of Rhonda.
He presumably burnt to death with Mary.