For those not in the know, as I was, VAM stands for Value-Added Modeling, a method of (apparently) calculating the effect of a teacher by comparing their studen

For those not in the know, as I was, VAM stands for Value-Added Modeling, a method of (apparently) calculating the effect of a teacher by comparing their students' grades with those same students' grades in previous years and with other students of the same grade. https://en.wikipedia.org/wiki/Value-added_modeling https://en.wikipedia.org/wiki/Value-added_modeling