I gave a mid-term exam for all 193 of my students taking my course, Materials: The Substance of Civilization a short time ago. I believe it is the largest (by number of students) exam in the history of Dartmouth's summer program. Most of the students taking the class are "rising juniors" in the class of 2007. The completed exams, shown in the photo, took 30 hours to grade. Try some of the questions in the exam which are in the quiz to the left of this column. Remember, this class is for non-engineers.