Cook began the National Honor Society Chapter which still exists at Concord High School.

[11] Some athletic teams that Concord High School has are cross country, football, wrestling, golf and soccer.

[12] On December 3, 1985, a 16 year old dropout named Louis Cartier entered the building with a shotgun, and was promptly killed by Concord police officers.

[13] During the 1999-2000 school year, teacher Joanne McGlynn's media literacy class gained nationwide prominence when its students fact-checked claims made in the media about a quote regarding the "Love Canal" that Al Gore had made when addressing the school.

Another notable event which occurred at Concord High School was the resignation of Principal Tom Sica.

During his time as principal at Rundlett, allegations of sexual assault and misconduct were placed upon a teacher, Howie Leung.

Once he had moved to the high school, news of this suspension, and the circumstances surrounding it, were brought to the public, leading to outrage in the Concord community.