Even though he started writing the script before the event , director Paul F. Ryan later based the film on the Columbine High School massacre ; the film was released only three years after the incident . Ryan and Christensen visited Columbine High School before the film 's release to speak to students , faculty and parents , who received a private screening of the film . The response was generally positive and Ryan has since returned as a guest of the school twice
Columbine High School massacre
Columbine High School massacre
Home Room (film)