States the report: "Each year, tens of thousands of ["irreplaceable" teachers"] are lost from urban districts due to factors that could be controlled and addressed, including a failure by principals to prioritize teacher retention, toxic school culture, and policies that explicitly undervalue the best teachers."No doubt, some of the reaction is just because the paper comes from TNTP, the TFA spinoff that was founded by Michelle Rhee, and is a major alt cert provider (through the Chicago Teaching Fellows).
Some of it's because the paper's findings and recommendations take a while to digest and not everyone agrees on what makes a teacher irreplaceable, anyway.
Alas, there are no Chicago-specific statistics to share -- the districts go unnamed.
I'm not even sure how many CTFs there are in Chicago, though I get the sense that they're as big or bigger than TFA.
The report doesn't say that CTFs are all irreplaceable, by the way. That's just me getting your attention.