I have recently retired from teaching high school math in an independent school, and now work largely with public schools, as a freelance math education consultant and curriculum developer. If I were still in the classroom, I could have ignored the Common Core State Standards for Mathematics (CCSSM) for a while, because their impact on private schools would take some time to kick in. However in my new career, the CCSSM affect everything I do, so I decided to take a close look at the standards for grades 9-12.

The views I articulate in this paper are based on my own experience as a teacher (42 years in the classroom, K-12), curriculum developer (author of a dozen books, a dozen articles, and a large math education Web site), and department chair (30 years or so at the Urban School of San Francisco.) I realize that this does not guarantee that I am right about any of the questions I'll be addressing. On the other hand, I am confident that my experience is at least as valid as that of any one of the authors of the CCSSM.