Still no response from CPS or Polaris, the maker of TeacherFit, but a commenter over the weekend dug up the following lines from the Polaris website that suggest the online measure may be being used inappropriately (or at least differently from how it's being presented to teachers):
"While the completion of this tool is a required component of the CPS teacher application, the RESULTS WILL NOT BE USED in any way to assess or inform your candidacy for employment at CPS. Principals and other hiring managers will NOT have access to the data. The results of this tool will ONLY be used to research the accuracy and reliability of the Polaris tool itself."
How broadly, or how appropriately, the online test is being used in CPS, or how much is being spent on this project, we still don't know. We don't even know what the test covers, or aims to get at. The company is Illinois based, if that helps, but seems to be relatively unknown outside the state.