A good TA: priceless

These are images of quizzes I took in 3.091, Introduction to Solid-State Chemistry, in the fall of 1980. One is my very first exam at MIT, and getting 49 out of 100 was a soul-crushing experience. I can still picture the TA, Leszek Pawlowicz, PhD ’87, returning my paper. He had a big smile on…