Study: Charter Schools Do Not Create a Rising Tide That Lifts All Boats

Diane Ravitch's blog

The conservative school-choice advocacy organization Thomas B. Fordham Institute published a report claiming that the existence of charters raises test scores in surrounding public schools. The claim is that “a rising tide lifts all boats.” This seems counterintuitive when you think about Detroit and Milwaukee, which are flooded with charters but mired at the bottom of urban districts tested by NAEP.

Now this assertion has been reviewed by a scholar and found to lack validity.

William J. Mathis: (802) 383-0058,
Yongmei Ni: (801) 587-9298,

Report About Charters Being a “Rising Tide” Sinks Under Weight of Flawed Data

An NEPC Review funded by the Great Lakes Center

Key Takeaway: Due to data and methods limitations, report fails to prove its claim that higher charter market share is associated with achievement gains for all students.

EAST LANSING, MI (November 14, 2019) – A recent report from the…

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