A Teacher hands out an exam, you can talk to whomever you want about any question, any answer.
A Teacher hands out an exam. The class can vote on the answer to each question, students can make impassioned speeches, the decisions will be used to grade the exam.
Switch exams with a neighbor. Your grade is determined by how well your neighbor performs on your exam. You may not talk to your neighbor.
Each student speaks about a topic. Exam questions are based only on the factual information given by each speaker, and no other information.
The last exam is the instructor’s version of each question from the previous 4 exams, but you may not dispute the answers to any questions. Your grade for the class is a choice between your average for the 4 previous exams, or the sole result of the final exam.