From the fights about the teaching of evolution to the details of sex education, it may seem like American schools are hotbeds of controversy. But as Jonathan Zimmerman and Emily Robertson show in this insightful book, it is precisely because such topics are so inflammatory outside school walls that they are so commonly avoided within them. And this, they argue, is a tremendous disservice to our students. Armed with a detailed history of the development of American educational policy and norms and a clear philosophical analysis of the value of contention in public discourse, they show that...