Chris Aviles on edSurge offers a truly brilliant grading system using Google Forms, Google Sheets and his self-developed student tracking system. I had a similar experience as Chris when I taught high school, however, my solution was not nearly as innovative and I suspect, effective as Chris’.
If you teach, please, please read his article and study his forms. Adapt and adopt as necessary to your situation. Students can sometimes learn as much, maybe more, from the education process than from instruction per se. Peer grading with anonymity and without competition has been shown to be a valuable learning tool.