Oscar: Clearly, student evaluations provide the best assessment of teacher performance. Who is in a better position to judge a teacher than that teacher ' s students? Bettina: Student evaluations of teachers are usually conducted at the end of a class. However, students generally fail to appreciate the impact of a teacher until many years later. So, peer evaluations of teachers might be a good supplement or a better alternative. The dialogue provides the most support for the claim that Oscar and Bettina disagree over whether ['student evaluations furnish the optimal assessment of teacher performance', "students are ever capable of adequately judging a teacher's performance", 'student evaluations are usually conducted at the end of a class', 'teacher performance should be assessed without conducting any student evaluations']