I have set up grading periods in my grade book. The issue is, I can see all my grades in the "All Grading Periods" but when i go to the period 1 page not all my grade can be seen. The assignments are there, but not all the grades.
Tina, I've never used the Grading Periods before, but I did a little research and found the following guide - How do I view and modify the grading periods available for my course? - which doesn't really address your problem other than saying "You can only edit grades in a current or future grading period. Once a grading period has passed, you cannot edit grades for the prior grading period unless you have permission to modify the grading periods being used in the course."
I'm going to share your question with the K-12 group in the Community because they might have more experience with this feature, but you might also want to contact Canvas Support about your problem. If you're not sure how to do this go to your gradebook and where you're having the problem, then click on the Help link (upper right in Canvas) and "Report a Problem." Make sure and fully explain what the problem is.
Hope this helps!
Retrieving data ...