This semester I am teaching a course. Due to the fact that the students differ in their abilities, I decided to create a few "extra credit" questions for some of the assignments to stretch the thinking of the more capable students. However, at the same time, I don't want to stress the less capable students and make them feel that they need to solve problems that are difficult, but not so essential to getting an adequate mastery of the material.
Unfortunately, I am not sure how to compute the scores for assignments with extra credit. Suppose the assignment has 100 marks, with 10 marks extra credit. Suppose a student completes all of the regular questions as well as the extra credit questions correctly.
- Do I give this student 110 marks for the assignment?
- Or do I cap the max score of the student at 100 marks?