A newly elected conservative school board in one of Colorado’s largest school districts clashed with thousands of students this fall. That’s after the school board approved a committee to review history curriculum. The resolution -- stating that history classes in Jefferson County schools should promote "patriotism, essentials and benefits of the free enterprise system, and respect for authority” -- angered students and teachers, who walked out of class in weeks of rolling protests. CPR covered the protests but also dove deeper into what exactly changed in history classrooms with the new AP History curriculum and why it so upsets conservatives. We examined the origins of the change in the history curriculum, and how the protests changed students.