The letter C appears to have assumed an especially prominent place in discourse about education today. There is, of course, the Common Core, the latest attempt to define and implement a set of national standards for what students should know and, even more importantly, be able to do with that knowledge, with a strong emphasis on so-called higher order thinking skills. And, there are, in various configurations, the four (or five, or six, or seven) Cs that name critical “21st century learning” skills, items such as creativity, collaboration, curiosity, communication, critical thinking, cross-cultural understanding, and others that have been suggested, seen as vital for students to be able to thrive in a rapidly changing world.