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Denver Classroom Teachers Association negotiations with the Denver Public Schools district officials at the Denver Teacher's Club Feb. 07, 2019.

Denver Classroom Teachers Association lead negotiator Rob Gould, right, talks with Denver Public Schools teachers and supporters before contract negotiations at the Denver Teacher's Club Feb. 07, 2019.

Denver Classroom Teachers Association negotiations with the Denver Public Schools district officials at the DPS Acoma Campus Feb. 09, 2019.

Merrill Middle School 6th grade classmates, Elise Myren, left, 12, and Abby Mello, 11, on hand in support of the Denver Classroom Teachers Association negotiations with the Denver Public Schools district officials at the Denver Teacher's Club Feb. 07, 2019.

New Denver Public Schools Superintendent Susana Cordova, right, speaks during negotiations with the Denver Classroom Teachers Association at the Denver Teacher's Club on Feb. 7, 2019. The Denver Board of Education approved Cordova's contract on March 7, 2019.

Teachers and supports listen on the Denver Classroom Teachers Association negotiations with the Denver Public Schools district officials at the Denver Teacher's Club Feb. 07, 2019.

Denver Classroom Teachers Association lead negotiator Rob Gould, right, talks with Denver Public Schools teachers and supporters before contract negotiations at the Denver Teacher's Club Feb. 07, 2019.

Retired Denver South High School music teacher Dixie Lingler, fires up teachers and supporters leading them in a song before the Denver Classroom Teachers Association negotiations with the Denver Public Schools district officials at the Denver Teacher's Club Feb. 07, 2019.

Denver Public Schools teachers from Kaiser Elementary, Lauren Griner, left, and Keri Phillips, right, get fired up during Denver Classroom Teachers Association negotiations with the Denver Public Schools district officials at the DPS Acoma Campus Feb. 9, 2019.

Teachers and supporters get fired up before the Denver Classroom Teachers Association negotiations with the Denver Public Schools district officials at the Denver Teacher's Club Feb. 07, 2019.

Denver Classroom Teachers Association negotiations with the Denver Public Schools district officials at the Denver Teacher's Club Feb. 07, 2019.

Denver teachers listen intently to Denver Classroom Teachers Association negotiations with the Denver Public Schools district officials at the DPS Acoma Campus Feb. 09, 2019.

Pam Shamburg, with the Denver Classroom Teachers Association, right, along with lead negotiator Rob Gould, during last minute negotiations with the Denver Public Schools district officials at the DPS Acoma Campus Feb. 09, 2019.

Denver Classroom Teachers Association president Henry Roman, right, along with lead DCTA negotiator Rob Gould, left, give an update on the Denver Public Schools last proposal at the DPS Acoma Campus Feb. 09, 2019.

Denver Public Schools language acquisition teacher Paula Zendle, right, doesn't like what she hears during the Denver Classroom Teachers Association negotiations with the Denver Public Schools district officials at the DPS Acoma Campus Feb. 09, 2019. The DCTA rejected the 11th hour DPS proposal and will strike Monday morning.

Denver Public Schools legal counsel Michelle Berge, right, wipes away tears after taking public comment from disgruntled teachers after failed 11th negotiations at the DPS Acoma Campus Feb. 09, 2019. The DCTA rejected the DPS proposal and will strike Monday morning. Debbie Hearty, DPS chief human resources, and DPS superintendent, Susana Cordova, center, wrap up before leaving.

Denver Classroom Teachers Association lead negotiator Rob Gould, right, rests his hand on his forehead in disbelief after DPS legal counsel Michelle Berge said that she took a pay cut to invest in teacher salaries during contract negotiations at the DPS Acoma Campus Feb. 09, 2019. The DCTA rejected a DPS proposal and will strike Monday morning. DCTA deputy executive director Corey Kern, left, looks towards the DPS panel. (Photo by Andy Cross/The Denver Post)

Denver teachers chant during caucuses at the Denver Classroom Teachers Association negotiations failed at the DPS Acoma Campus Feb. 09, 2019. The DCTA rejected the DPS proposal and will strike Monday morning.

Denver Classroom Teachers Association negotiations with the Denver Public Schools district officials at the DPS Acoma Campus Feb. 09, 2019.

Denver teachers snap pictures of the big screen that has a proposed Denver Public Schools ProComp base pay schedule on it from Denver Classroom Teachers Association negotiations with the Denver Public Schools district officials at the DPS Acoma Campus Feb. 09, 2019. The DCTA rejected a DPS contract proposal and will strike Monday morning.

Denver Public Schools district officials take public comment from teachers after the Denver Classroom Teachers Association negotiations failed at the DPS Acoma Campus Feb. 09, 2019. The DCTA rejected the DPS proposal and will strike Monday morning.

Bill Roberts Elementary School 5th grade teacher, Chelsea Teutsch, pleads with Denver Public Schools officials, Debbie Hearty, left, superintendent Susana Cordova,center, and DPS legal counsel Michelle Berge after the Denver Classroom Teachers Association negotiations failed with Denver Public Schools at the DPS Acoma Campus Feb. 09, 2019. The DCTA rejected a DPS proposal and will strike Monday morning.