[KevinB]

Public school teachers come from the bottom 20% of the graduating statistics at colleges.

Can you provide support for that statement?

[blackdog]

The second standard source for the “bottom third” claims is more clear and well-documented. It is a subsequent McKinsey report (2010), one which doesn’t rely on questionable interpretations from indirect sources, but rather its own analysis. That report claims, “The U.S. attracts most of its teachers from the bottom two-thirds of college classes, with nearly half coming from the bottom third.”

http://drwilda.com/tag/do-teachers-really-come-from-the-bottom-third-of-college-graduates/

In Wisconsin it was the bottom 20%.