Hi George ~
With Canvas, you'll first need to be able to find your school's domain.
Where do I find my institution's URL to access Canvas?
However, you could also do this (maybe more easily?) with the Canvas Parent app. After installing the app (which is free for iOS and Android users), you can then tap Find My School. On that screen, you can type in your district or institution's name, and it should automatically populate.
From there, you'll need your student's pairing code.
How do I generate a pairing code for an observer as a student?
Please let the Canvas Community know if this works for you or not. We'll help you along the way! 
This discussion post is outdated and has been archived. Please use the Community question forums and official documentation for the most current and accurate information.