Columbia University Press recently published Mark Hulsether's Religion, Culture, and Politics in the Twentieth-Century United States, a book very much oriented for classroom use. You may find an interview with the author here at the Columbia University Press blog. A little excerpt:
Thus I stress using multiple maps and critical tools to analyze US religion. I think it is crucial not to get carried away by a common wisdom that imagines a binary struggle between “real religious values” on one side, versus either a purely “naked” public square or a religious liberalism that is just a halfway house to secularism.