This Andrew Stillman script attaches a rubric created in google forms to a document that you sent to students with Doctopus. It allows you to grade the assignment and it will then attach the rubric to the document and send an email with the rubric to the student.
Goobric can be used to grade any assignment sent out using Doctopus. You can send emails right away, or choose not to and wait until you have graded all assignments. I would recommend using the grade column to use a formula (sum or average) to calculate a grade, and you can add written feedback. Then you can send personalized emails to students w/ their grades and comments. They will then be able to find the rubric on the bottom of their document. (Goobric only attaches rubrics to the bottom of docs, not presentations. However an email will still be sent with the rubric).