Hi, @ToddBooth ! Thanks for posting on the canvas community.

On the Free for Teacher edition of canvas, to add students you must click the People link via your course navigation. Once you click the People link, you will be greeted with a roster of everyone in your class. Click the + People button on the top right hand corner of your screen, then enter in the email connected to the canvas account you want to add.

I hope this helps you, reach out with any questions! I'll provide a quick video below to assist you.

Noah B. 

People Tab - Canvas Studio