My Calc III teacher this fall gives take home exams because he insists that there isn't enough time to cover all the material in Calc III, so he needs every class hour to teach, thus he gives take-home tests. Knowing people who took his calc III class last fall, and him curving an A to be 70%, I know his exams are hard. He wouldn't give me any examples, and someone said the exams were "PhD worthy, so hard you didn't even know how to start them". I've been trying to prepare myself for the class this fall by searching for take-home Calc III exams that universities around the world have posted online. So far not good. I was wondering if anyone knows any decent colleges who have posted hard exams? I guess this includes vector calculus too?