|by Diane Ravitch|
The Forward Institute sent me their latest study of charter school performance compared to public schools in Milwaukee. Here is the takeaway: There is no significant difference between the performance of public schools and charter schools. However, public schools in Milwaukee are more successful with the poorest students than are charter schools. None of this matters to Governor Scott Walker and the Republican-dominated legislature, which is intent of privatizing more schools, regardless of evidence.
Here is a link and a synopsis:
Milwaukee and statewide school districts show a significant correlation between the level of Economic Disadvantage and Report Card scores. The higher the level of poverty, the lower the Report Card scores. The plot also shows charter schools at the lowest income levels having lower scores than their public school counterparts – consistent with the statewide data. There is a difference in the data, however – one not addressed by charter school advocates.
In the statewide data, charter schools have a significantly higher percentage of low-income enrollment than public schools (43.6% Charters, 32.7% Public). In Milwaukee, public schools have a greater percentage of low-income enrollment than charter schools (88.5% Charters, 95% Public). (Low income is defined in this study as schools with ED enrollment higher than 48.9%. Middle income is ED enrollment of 30.4% to less than 48.9%. High income is ED enrollment less than 30.4%).
Based on the statewide outcome, we would have expected Milwaukee charter schools to perform better on the Report Cards in the lowest income group than public schools – having a lower percentage of high poverty schools. That is not the case. Figure 3 shows that in the middle and low-income groups, charter schools scored lower than public schools in Milwaukee.
At the very least, based on the standard deviation, charter schools scored no better than public schools in Milwaukee. This would suggest that in spite of MPS traditional public schools having more schools with high ED enrollment than charter schools, they are still scoring no worse than their non-traditional charter school counterparts.
The data does not support the claim that Milwaukee Charter schools outperform traditional public schools. At the very least, the difference is not statistically significant. At the most, the mean Report Card scores indicate that Milwaukee Public Schools are outperforming their Charter School counterparts – particularly in the schools of highest poverty. In Racine, the highest poverty RUSD schools are performing on a par with statewide Charter Schools, and only slightly lower than statewide Public Schools.
*Note - Our data considers any non-traditional charter school as defined by DPI as a "Charter." This includes non-instrumentality and instrumentality (but non-traditional) schools.