Different people, but increasingly many educational systems use marxists like this guy https://en.wikipedia.org/wiki/Howard_Zinn who obviously believes in Critical Theory and revising history.

In a 1998 interview, Zinn said he had set "quiet revolution" as his goal for writing A People's History. "Not a revolution in the classical sense of a seizure of power, but rather from people beginning to take power from within the institutions. In the workplace, the workers would take power to control the conditions of their lives."[4]

A People's History of the United States has been criticized by various pundits and fellow historians. Critics, including professor Chris Beneke and Randall J. Stephens,[5] assert blatant omissions of important historical episodes, uncritical reliance on biased sources, and failure to examine opposing views.[6][7]

And the Marxist history is promoted actively:

In 2008, the Zinn Education Project was launched to promote and support the use of A People's History of the United States (and other materials) for teaching in middle and high school classrooms across the U.S. The goal of the project is to give American students Zinn's version of U.S. history.[20] With funds from an anonymous donor who had been a student of Zinn's, the project began by distributing 4,000 packets to teachers in all states and territories. The project now offers teaching guides and bibliographies that can be freely downloaded.[21]

Problem here is that it’s ideologically motivated propaganda to support Marxism rather than liberal individualism, and Marxism is historically used by absolute authoritarians to turn people into useful idiots who just end up worse off.