As a math teacher, I have the students submit PDFs of their work in their Schoology assignments. I then write on the PDF with my iPad, and then submit the corrected document to Schoology. For the students to see the graded paper, they have to tap on the assignment, open their submission, and then show comments, and then open the attached file with my comments.
It would be great if the returned document was easily accessible to the students. Perhaps an update or notification that linked directly to the returned, graded document??