The two stage midterm shown here is the second of three midterms in a first year general science course being taken by 300 students, EOSC 114, “Natural Disasters“. There are three 50-minute lectures per week in a 13 week term. Teaching is primarily lecture-based, but clickers and worksheets are used, as shown in the video clip V04: Large active class, 1st yr sci.
Therefore students are used to discussing during class either in pairs or small groups. Also, their final exam will be a two-stage test very similar to the one seen here, although there will be as many of 900 students taking the exam because there are several sections of this course.