I am teaching a new course for the first time, and the plan includes short student presentations. I asked the students what they think of the course in advance, and one of them commented that s/he is afraid of the presentation part and would prefer to skip it. I do not think that I can allow one student to skip a task that the others need to do, but this problem is probably quite common among students. what do you suggest that I should do? Do you know of any research on this issue?