Brains of Bats, Pins, and Needles

As deadlines loom and assignments pile up, I’m growing worried that, like L. Frank Baum’s Scarecrow, I have no brains left, or that what brains I do have only consist of the Wonderful Wizard’s placebo: bran, pins, and needles. Although, I’ve noticed that some professors have the pictured attitude towards their students, so they might not be expecting too much. Now if I can just avoid becoming a fear-crazed maniac over exams…