Creating Calendar Events to show on your course calendar so students can see everything happening in your class for the week whether it is graded or the quiz is created yet or not.
One workaround for "missing" not showing up for a paper/pencil assignment. Within this video a text box and file upload option is mentioned. Remember with file uploads students will need to save a Google doc as a pdf or word doc first in order to upload it.
The different scenarios to use due dates and availability dates in Canvas assignments
Creating rubrics for assignments within Canvas
Using images embedded in Google Docs to receive an image of a paper/pencil assignment or other image in a way that is consistently the same from each student