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Suspicious erasure patterns at 53 schools

This article was originally published in The Notebook. In August 2020, The Notebook became Chalkbeat Philadelphia.

The state ordered investigations in 53 Philadelphia schools based on evidence of suspicious erasures that showed up on forensic analysis of the tests from 2009-11. Test scores went down sharply in 2012 at many of these schools after new test security measures were put into place.

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