Charter public schools began as the "research and development" alternative to traditional public schools over 20 years ago, but today they account for significant portions of student enrollment in many cities. In more than 190 districts across the country, charter school attendance makes up at least 10 percent of public school student…

In cities where public charter schools serve a large share of students, the costs of ongoing sector divisions and hostility across district and charter lines fall squarely on students and families. Exercising choice and accessing good schools in "high-choice cities" can be difficult for many families, especially some of the most…

Many districts are expanding and diversifying the school options available to parents--a trend that shows no signs of reversing. While all public schools are required to test and publically report results, it remains nearly impossible for families and education and civic leaders to make school-to-school comparisons, especially across district-run…