Parent's are expected to join Canvas as an Observer. You will be given a handout to show them how to do this. It can also be found here. Getting a parent on Canvas is worth 100 points. If a parent chooses to not be a member of Canvas, then they will have no other method to view how your are doing in your classes. A parent will need to sign a waiver that says that they do not want to be an Observer in Canvas.
Can't change a rubric once you've started using it.