Critics of charter schools in New York City often allege that charters score better on standardized tests, on average, than traditional public schools because charters “cream-skim” (i.e., attract) the brightest, most motivated, students.

For years, government-run school districts have been slandering charter schools with the lies related to “creaming” the best and brightest kids.

Source: New York Charter Schools Outperform Traditional Selective Public Schools | Manhattan Institute