id author title date pages extension mime words sentence flesch summary cache txt WOS-000466132500004 Spees, LP Evaluating Charter School Achievement Growth in North Carolina: Differentiated Effects among Disadvantaged Students, Stayers, and Switchers 2019 .txt text/plain 133 5 38 In the first study of charter school effects on the full range of charter school students in North Carolina, we find that, in general, charter school performance has improved over time, although often it continues to remain lower than traditional public school achievement. Small lottery studies on high-performing charters produce impressive results, but large observational studies on the full range of charter schools are less encouraging. cache/WOS-000466132500004.txt txt/WOS-000466132500004.txt