Critical Race Theory is the Understanding That:

Racism affects every aspect of US society and culture.

Racism is not merely the product of individual bias, prejudice or action, it is systemic.

Racism is embedded in our legal, social, economic, medical and educational systems.

"Republicans want students to learn a mythological version of U.S. history because the reality of the past threatens their power in the present."  --Adam Sanchez.  Zinn Education Project.