Students who are "difficult to educate" are not enrolling in public charter schools at rates as high as other students. One researcher says a system used in Colorado could be the answer.

Denver uses a simplified common enrollment system for its charter schools. The form requires parents to rank their school preferences, which leads to better matches between families and schools.

The form makes it easier for families to apply, and that leads to more enrollment from the most disadvantaged student groups, according to Marcus Winters. Winters is a senior fellow at the conservative Manhattan Institute, where I used to be employed.

Students with disabilities, racial minorities, students learning English as a second language and those eligible for free or reduced-price lunch all fall under Winters's classification of disadvantaged students.

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