As an academic topic, Critical Race Theory would be presented in a post secondary setting, at the college and university level.
My son's class studied family trees in 4th grade. As a family project, each child was to create a personal family tree as best they could. Parents and grandparents were expected to got into the act of tracing back as far as possible. It was a cool, interesting project for our family.
The day the trees were due, each child stood before the class to briefly explain their trees. One of my son's friends showed a chart ending abruptly with all his great-great grandparents. He told the class that was all his family knew, because before that they were slaves who were bought and sold at will by their owners. The family had no information when his ancestors were taken from Africa, or even where in Africa they were taken from.
The worst part, my son said, that when Troy told his story, he did so with head hung low in shame and tears spilling down his cheeks. The teacher tried to intervene to soothe this tender 9 year old, but he said, "No. I want to finish."
Let me tell you, of all the genealogy accounts he heard that day Troy's was the only one to make an impression on my son. When he related Troy's family history at the dinner table that night you could have heard a pin drop. We were each stunned into silence, realizing how different our family histories were, and feeling great shame at this very long, very terrible chapter in our nation's history.
I will always be grateful that at a young age my children realized one of the many terrible legacies imposed by the injustice of slavery on our friend's family, and many, many Black Americans.
CRT is an important academic topic. Banning its teaching is little more than hiding under a blanket, fingers in our ears, trying to pretend no lasting harm has been done to the descendants of slavery.