I teach Medical Law and Ethics and while we do have a Review Challenge at the end of every chapter, we also do a lot of case studies and discussions. I have ben having difficulty deciding how to evaluate this since some students obviously participate more than others. I also am wary of giving those students that missed the discussions 0 points since it can be a major part of their grade, should I allow them to write their anwers to the case studies and give them some points or all the points?