ABSTRACT
I recently pre-enrolled students in a sophomore course at Berkeley, Physics 4E. It is a day-long process wherein students come in to fill out cards and pick up 'handouts'. Among the things I handed out was a list of the laboratory experiments together with some comments about them. When I came to those that don't work very well as a rule, I fell back on the usual professorial gambit of describing them as 'more challenging'. I then grandly departed, leaving the rest of the chore to the graduate teaching assistants. Returning at 4:30 pm to close the pre-enrolment I found that my assistants had compiled their own list of 'more challenging labs' on the blackboard:
