On a number of occasions, I’ve written about what I call “sector agnosticism” in urban education. It’s a simple concept: We shouldn’t care what sector a school belongs to (traditional public, charter public, or private); instead, we should judge schools based on their quality. There’s been movement in this direction in Cleveland, Detroit, Denver, New York City, and Washington D.C., and now there’s a fledgling initiative in Philadelphia…Read it here.