...since she required us to maintain a sheet showing our grades in her class...
Umm...isn't that what she was paid to do? I could maybe see this as an ongoing lesson for a math class, but science? 
I had a couple of teachers that required this. They maintained their own gradebook, but you were required to keep your own grade sheet as well, so you could know what your current grade for the class was. One teacher that required the grade sheet also required it to serve as a quasi-table of contents for a binder containing all of the graded homework and all of our notes from class, in the order assigned. She would occasionally collect the notebooks and verify that everything was present and organized, and we would receive a grade on that.
I don't remember any of the math she failed to teach us, but boy do I remember her bureaucratic notebook horseshit.
