When I was a little kid, the teacher didn't give us grades on our papers. She gave us little adhesive stars of different colors. The gold star was the best compliment you could get on your work from the teacher. Silver was next, I think. Blue, green and red came after. If you did really poorly, you got a "grumpy face".

On E2, getting a C! is sort of like getting a gold star.

Sometimes, I've been known to blurt out, "Wow! You get a gold star!"