test. And then the best grade she will give them is a C. She does this to help keep kids from flunking the class.
She does similar on late work. It has to be done within a certain amount of time. The sooner they do it, the more they can raise their grade but they will not be able to receive 100% credit when the work is turned in late.
She would rather have students re-take tests and turn in work late than doing work for extra credit.