So Mara's going to be the person who will see you after class and she will take the problem sets that you have submitted before class and she'll give you the graded ones after class.

玛拉将是你们的课后辅导老师,她会批改你们上课前交给她的作业,课后她会将批改后的作业发还给你们

耶鲁公开课 - 基础物理课程节选