Do Teachers Really Come From The "Bottom Third" Of College Graduates?

Matthew Di Carlo:

The conventional wisdom among many education commentators is that U.S. public school teachers "come from the bottom third" of their classes. Most recently, New York City Mayor Michael Bloomberg took this talking point a step further, and asserted at a press conference last week that teachers are drawn from the bottom 20 percent of graduates.

All of this is supposed to imply that the U.S. has a serious problem with the "quality" of applicants to the profession.

Despite the ubiquity of the "bottom third" and similar arguments (which are sometimes phrased as massive generalizations, with no reference to actual proportions), it's unclear how many of those who offer them know what specifically they refer to (e.g., GPA, SAT/ACT, college rank, etc.). This is especially important since so many of these measurable characteristics are not associated with future test-based effectiveness in the classroom, while those that are are only modestly so.

Still, given how often it is used, as well as the fact that it is always useful to understand and examine the characteristics of the teacher labor supply, it's worth taking a quick look at where the "bottom third" claim comes from and what it might or might not mean.

Posted by Jim Zellmer at December 7, 2011 1:16 AM
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