African American History Is Not On Here As A Subject

I'm going into my Sophomore year and I will be taking African American History so I thought that this subject would be on Khan but as I can see it isn't. I think it is very important that this subject should be added because there are high school students who would be needing extra help information for this subject. Not only that but it is important to spread African American History through out the world. It is equally important as the other History subjects. Thank You