Comparison of Charter school performance to public schools.
<a href="https://en.wikipedia.org/wiki/User:CartoonDiablo" class="extiw" title="en:User:CartoonDiablo">CartoonDiablo</a> own work, released under Public Domain.
Based on the CREDO study, <i><a rel="nofollow" class="external text" href="http://credo.stanford.edu/reports/MULTIPLE_CHOICE_CREDO.pdf">Multiple Choice: Charter School Performance in 16 States</a></i>