If you are interested in having an account setup so you can observe students directly in the learning platform, Canvas, please email firstname.lastname@example.org to request.
To view grades for all students at once, from your Dashboard, click View Grades:
A list of all your students and their current grade displays. To view more details, click on the student's name:
From here you can see the score, the due date and the 'Out of' points.
If you see a speech bubble icon next to an assessment, that is an indication of a comment by the teacher. Click on the icon to see the additional comments.
Further, if a student is in more than one course, you can toggle between them using the dropdown at the top of Grades screen. This same principal applies if you are looking at a gradebook in a course that has multiple students you are observing.