You have the ability to sign-up on Canvas to be a parent observer of your child(ren). From the Canvas help guides:
"Observers can link their Canvas account to their student's account so they can see assignment dues dates, announcements, and other course content. Observers can view the course content but cannot participate in the course. They can only see their own child's work and not any work or material from other students."
Please watch this video (less than 2 minutes) on how to get set-up as an observer. You will receive an email confirmation once you have set up your account.
To add a second (or more students) to the ones you are observing, you will follow a similiar process and the directions are listed here.