Let us assume for now that their contention is true, that you can assess a “good” teacher by their students’ test scores and that bad teachers adversely impact the futures of their students. Why, then, is “the message …to fire people sooner rather than later”? There is nothing in their research that proves firing bad teachers sooner rather than later is a benefit. First, with whom do you replace those bad teachers? First year teachers would be unknown quantities since they cannot be judged by student exam scores. Would it be beneficial to use them over bad teachers? Why fire anyone at all? The message of their research could just as easily be to mentor or support bad teachers so they can become good teachers. Or maybe the message is we need to do another study on what makes the “good” teachers so good and teach that to all the bad ones. There are literally hundreds of conclusions that can be drawn from this research. Out of all of those conclusions, it is curious that Friedman would choose to spout this one. Logically speaking, it does not necessarily follow from his research.

Dogma influences research interpretation?