As far as I'm concerned there's no Basic Geometry course. The geometry prior to the class on HighSchool are subsections inside each grade. 

Hi Paul,

Unfortunately the Basic Geometry course is not listed in the class course selector, and is thus not able to be assigned from the "Assign" tab within your KA class. I've forwarded this request to the team so they can consider adding this in future updates!

In the meantime, you can always assign content from any course by navigating to the course directly and using the assignment toolbar that appears at the top of the page. This article explains how to use the assignment toolbar.

I hope this helps! Please let me know if you have any additional questions!