Expanding the final example: say I currently give 20 students As, 15 of them score me at 1.05, 5 of them are so happy to get As they score me at 1.65. I give my

Expanding the final example: say I currently give 20 students As, 15 of them score me at 1.05, 5 of them are so happy to get As they score me at 1.65. I give my 80 other students Fs, and they score me at 1.0. Then on average my A students will score me at 1.2, and my F students will score me at 1.0, and my score for the whole class will be 1.04. But suppose I were to give 10 more F students As, and they would also be so happy that they'd also score me at 1.65. By doing so, I'd increase my average score from 1.04 to 1.105---for all we've been told, that may be several standard deviations across other teachers, and may translate to substantially higher salary and job security for me.