Hi Melissa!

Either option will still allow you to teach/parent any student/child accounts linked to yours. 

This article might point you in the right direction if you still need help.

https://support.khanacademy.org/hc/en-us/articles/204784264-I-m-a-teacher-coach-or-parent-how-do-I-start-using-the-site-

Hope this helps!  Let me know if you have any other questions.

Elijah