The costs and pleasures of a computer science teacher.

The Communications Web site, http://cacm.acm.org, features more than a dozen bloggers in the [email protected] community. In each issue of Communications, we'll publish selected posts or excerpts. twitter Follow us on Twitter at http://twitter.com/blogCACM http://cacm.acm.org/blogs/blog-cacm Mark Guzdial considers the enormous opportunity costs of computer science teachers, while Bertrand Meyer ponders the pleasures of arguing with graduate students.