By the way, Sissy decided she would rather give up 6% of her FINAL course grade rather than do an extra 10 minutes of presentation, "for personal reasons." I replied that of course I respect her decision and that sometimes, quite appropriately, life takes priority over courses and grades.
I don't understand. The 6% penalty comes from getting a zero on the assignment, right? So she's opting for zero rather than give a 20-minute presentation. So what's this about "an extra 10 minutes"? Or are you giving her the option of doing a 10 minute presentation for partial credit? That seems overly generous.