Several people in this thread have provided examples. As for me: I got great grades in elementary school, high school, college, and grad school. I got terribl

Several people in this thread have provided examples. As for me: I got great grades in elementary school, high school, college, and grad school. I got terrible grades in middle school, on purpose -- I knew they'd be forgotten once I got to high school, and I thought the busy-work required to get good grades was boring and didn't help me learn. The point-accumulation systems we call "grades" are a terrible proxy measurement for actual learning.