What Critical Race Theory is?

The Florida board of education recently banned the teaching of critical race theory in schools. If you don't know what it si, here we got the answer.
Encyclopaedia Britannica defines Critical Race Theory as: 

 “An intellectual movement and loosely organized framework of legal analysis based on the premise that race is not a natural, biologically grounded feature or physical distinct subgroups of human beings but a socially constructed – and culturally invented – category that is used to oppress and exploit people of color.”

---