Because of a high number of teacher absences, two Jefferson County Schools, Standley Lake High School and Conifer High School, have canceled classes on Friday, Sept. 19, 2014, and closed their doors.

WESTMINSTER, CO - SEPTEMBER 19: Holding signs and chanting "my school, my voice", students from Standley Lake High School gather along Wadsworth Pkwy. and 104th Ave. in Westminster to show support for their teachers and ask for a quality education. Because of a high number of teacher absences, two Jefferson County Schools, Standley Lake High School and Conifer High School, have canceled classes on Friday, Sept. 19, 2014, and closed their doors. The teachers are negotiating their contracts with the school board. (Kathryn Scott Osler/The Denver Post via Getty Images)