We encourage you to try your best to make out the student's work. If you can read most of what a student has written, or enough to understand their work and assign a fair score and feedback, you should do so. The student's handwriting should not be factored into their score, and generally should not be mentioned in feedback.
If you have tried your absolute best and know you cannot give a fair score based on what you are able to read, you can hit "skip" and indicate that the student's work was illegible.
Teachers usually appreciate a message letting them know if you find work illegible. If the issue is due to the use of pencil or a light scan, they may be able to help with a clearer scan. Sometimes teachers have also gotten students to rewrite or type their illegible work. In any case, they'll at least have the heads up that this student will not be receiving a grade or feedback report and can plan accordingly.
Hello! I am in the process of grading your second period's Hamlet papers, and I cannot seem to make out much of what Derrick has written after the first sentence due to the illegibility of his handwriting. I'm not sure I would be able to assign a fair score to his work, so I am skipping grading for him. I just wanted to let you know early. If there's anything else you'd like me to do here, please let me know! -Stephanie