Teachers lie about races. But lies don't help victims. They fool and hurt.
If you can help victims, please come to share.
Categorizing humans
DNA, culture, history, geo-environment, religion, faith/belief, ideology, social status, mindset, etc. all play a role in shaping a race. Humans can be categorized into different groups that have distinctive characteristics based on the above said factors.
Ancient Spartans, Romans, and Vikings share more characteristics in common than ancient Romans and modern Italians.
You can call Christians a race and Protestants a sub-race.
Please share your categorization of humans and knowledge that could explain your categorization.