Hi Michael,

Students only need one account to be able to access all of the courses listed on the site. If you haven't created an account for him, you can follow the instructions here.

Once he has an account, you can customize the courses listed on his Learner Homepage by visiting that page while logged into his account and clicking the Edit Courses button in the top right.

Alternatively, you can assign content to him directly by creating a class from your own parent account using the classroom tools. 

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