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@inthehands Reasonable approach! Once I document my script, I'll open-source it and let others add that enhancement…
As for grade-recording: I first started teaching back when I was a grad student. Very early on, a student complained to me about her grade and showed me that I'd recorded it incorrectly. This horrified me, so I immediately wrote a grade-recording and calculation system (in APL…), and used it to create tear-sheets to hand to each student with their grades, there being no online way to send them in those days.