We didn’t explicitly say it was a requirement for Workbook 3, but please type the Github ID that you use to create your classroom repo into the type-in box in the Canvas assignment for all workbooks/assignments!
It only takes you a few seconds (it’s about a dozen keystrokes, and you have to go to the Canvas page anyway to get the Github classroom link). But it is very helpful for the TAs and graders.
You can do this when you go to the Canvas page to get the assignment link to Github Classroom.