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ARVADA, Colo. — Some students at high schools in Jefferson County walked out of classes to protest Tuesday morning, with protests planned at other high schools.

Students at Pomona, Arvada West and Ralston Valley high schools walked out of class in a show of support for their teachers and a new Advanced Placement history curriculum that has been called anti-American by some conservatives.

Since Friday, students have stood together in opposition to a Jefferson County Board of Education proposal to review the curriculum.

On Monday, 100 students, mostly from Evergreen High School, marched to district headquarters in protest, this coming after many teachers at Standley Lake and Conifer high schools called in sick or took vacation days Friday, forcing the district to cancel classes for the day.

Despite the unrest, the district hopes to move forward soon.

“I think that there’s other ways that we can work through these differences,” Superintendent Dan McMinimee said.

McMinimee met with the students after Monday’s protest. He told them he has received no complaints about the curriculum but also said the school board has a right to ask for a review.