I like to give personalized, hand-written feedback on students' papers. I realize it's an outdated way of doing it, but I teach at a rural school, and it's kind of expected here. All of my students created and shared Google Drive folders with me. They turn in their work by uploading assignments to these shared folders. I download each student's paper to my desktop from the Google Drive folder he or she shared with me. I mark the paper up with my stylus using the ink feature in Microsoft Word (it's available under the REVIEW tab). I save the changes. I upoad the paper back to the shared Google Drive folder for the student to review my comments. If students open the corrected paper with Google Docs, it just looks like a bunch of crazy marks. However, if they right click the document and open it with Lumin PDF Viewer, which is one of three options Google suggests by default, the corrected paper looks pretty decent. This takes a little longer than I'd prefer. It would be much easier if Google Docs had an ink feature like MS Word. It's the downloading and uploading that makes the process tedious. If I could mark up word documents in Google Docs, it would save a tremendous amount of time.