In response to an earlier post, a reader suggests a simple way to evaluate the oft-repeated assertion tat low test scores are caused by bad teachers:

I wonder why the reformers don’t try this experiment: Take the staff of an underperforming school and switch them for a year with the staff in a high performing school. Let’s see if the results are that different.

I say try it for three years. Compare the results in both schools. Good idea.

I have heard this proposed many times. With privatizers in control of so many districts and states (e.g. Louisiana, Tennessee, New Jersey, Wisconsin, Indiana, Maine, Pennsylvania), this should be easy to arrange.