> it's hard to know if you're a 2x teacher or a 0.5x teacher. Their students know. Even if it's a noisy metric, over the course of a few years a teacher will

> it's hard to know if you're a 2x teacher or a 0.5x teacher. Their students know. Even if it's a noisy metric, over the course of a few years a teacher will have 100+ students.