The fact that little change in status and growth was noted between the 2005 study and the current study is not unexpected, since the sample sizes in each study are so large that a major change in education would be needed to affect the norms substantially. On the other hand, individual schools and
districts show remarkable differences in how their students grow. While this is a fascinating story, it is one for another time.
This was the last sentence of the report. I'd love to know more about this story!
They mean "population size" not "sample size."
As far as education goes, they really need to follow individual kids and not just the districts to understand how education is doing. Then you can correct for both student and district effects.
