Glad to hear of the improvement. Keep it up!
What's your grading scale like?
Ours used to be 60-70=D, 71-80=C, 81-90=B, 91-100=A. (D's are considered failing grades in our nursing program)
It was changed 2 years ago to: 76-84=C, 85-92=B, 93-100=A.
I have a lot more C's now (I primarily teach nursing pharmacology and advanced medical/surgical nursing), but other courses have remained about the same. I attribute some of that to grade inflation.