Each assignment is curved separately, as explained below. Students then get the higher of the raw and curved scores. This accomplishes two goals: (a) the class is not penalized when an assignment is harder than it should be, and (b) if everyone does well, then everyone gets a high grade.
The initial curved score, y, is equal to a + b*x, where x is the raw score (percent of answers correct), and the two constants (a and b) are chosen so that y has median 85 and maximum value 100. Then the student gets the maximum of x and y. Thus, the curve never reduces a student's score.
For each student, the curved scores of the various assignments are averaged to get the final score. We assign letter grades subjectively, based on these final scores.
The link below will take you to a page that contains anonymized scores. If you know the (uncurved) score you got on each assignment, you can look up your current grade in the course. Click here [18 May 2024 09:50:45.] for the scores.