Canvas does not allow a rubric to be attached to an external tool for some unknown reason, so as I researched 52 youtube videos later, it seemed that I could create the assignment with another label like "online". After I made the assignment with the fake category and attached the rubric, then I could go back in and change the submission to external tool. This is a solid hassle and seems ridiculous, but desperate times and all that. Now it seems that even that doesn't work. Is there a way for Canvas to just make it so a rubric an be added to any assignment period? That would be great. Thanks.