[ryandrake]

My parents and step-parents are all retired teachers so I've seen the system from both the student and teacher's sides (and now also as a parent). School is not like a factory where raw material (students) come in, teachers apply work onto the raw material, and then finished product (educated students) come out. You can measure the students, but you are not measuring teaching quality. Student success is probably close to 95% parents/culture/homelife/nutrition and 5% some result of teacher input. If you have a reliable way to isolate and measure that 5% independently, by all means, suggest it to your local school board. They would absolutely love it.