When teachers go back to school, does it help their students?

Illinois education data shows school districts in Freeburg, O’Fallon, and Waterloo have the most highly-educated teachers in the metro-east. Does it affect students’ state test scores? Some images provided by morguefile.com.
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Illinois education data shows school districts in Freeburg, O’Fallon, and Waterloo have the most highly-educated teachers in the metro-east. Does it affect students’ state test scores? Some images provided by morguefile.com.