Dr. Bruce Baker has a good blog post up called “NJ Charter School Data Round-Up” in which he compares demographics between NJ charter schools and traditional schools in high-poverty urban areas and considers the policy implications. He discusses problems with scalability, and that charters in cities like Newark “continue to serve student populations that differ dramatically from populations of surrounding schools” when one examines eligibility for free/reduced lunch, special education enrollment, and students still learning English.
The comments to his post are worth pondering.