Chris Rickert:

More important than whether UW-Madison might take a chance on Madison Prep, though, is whether such a school chartered by UW-Madison would work. Caire said “higher education institutions tend to be more careful about who gets a charter and tend to charter some high-quality schools.”
There appears to be some evidence of this. Ten of 11 UW-Milwaukee-authorized charters have an average state report card score some 14 points higher than the Milwaukee Public Schools generally, with one charter school not rated.
The MPS and charter schools have comparable rates of poverty, although MPS schools have higher proportions of disabled students and English language learners. A special state test for disabled students and other accommodations can help mitigate the negative effect on a school’s overall performance but not necessarily completely, according to James Wollack, an associate professor and expert in testing and evaluation at UW-Madison.

Much more on the Madison Preparatory Academy, an IB charter school proposal rejected by a majority of the Madison School Board.
Madison’s non-diverse K-12 governance model spends about double the national average per student yet has sustained disastrous reading results for some time. The “same service” governance model has long run its course.