Most societies today are culturally diverse. Increasingly, minority groups are demanding recognition and self-governing rights to protect their ways of life against that of the majority. These demands represent a serious challenge for the state: how is it to balance between the equally legitimate claims of the many cultures inhabiting its…

Teachers might be working significantly more with one another, but principals are not. Superintendents might bring principals together for district meetings or even to expose their performance results to colleagues in public, but principal collaboration is too often trumped by district control. Even worse, more and more schools and their…