Brian Harvey
I'm a "Lecturer with Security of Employment" (a tenured full time teacher) at the University of California, Berkeley, where I teach SICP to about 600 students/year, along with a course on Social Implications of Computing and other things. My SICP lecture notes and videos are online at http://wla.berkeley.edu/cs61a and other course materials are at http://inst.eecs.berkeley.edu/~cs61a. SICP is our first course for CS and EECS majors. We offer a "zeroth" course for people without programming background, also Scheme-based, using my book Simply Scheme http://www.cs.berkeley.edu/~bh/ss-toc2.html.
I started out as a PDP-10 systems hacker at the MIT and Stanford Artificial Intelligence Labs, until one day a burning bush appeared before me and told me what I really wanted to do was teach. Well, two burning bushes actually: a copy of Summerhill that a housemate left lying around the living room, and, a little later, starting to hang out around the MIT Logo lab. I was a high school teacher (http://www.cs.berkeley.edu/~bh/freedom.html) for a while before starting to teach freshmen at Berkeley in 1987, where I discovered SICP, and where I've been teaching it ever since.
For fun I teach fifth graders, using Scratch (http://scratch.mit.edu). I'm involved in a project to add lambda to Scratch! (We're planning to use the augmented Scratch as the basis for a new zeroth course at Berkeley, which will be only half programming and the other half "big ideas.")
I also run the Berkeley Logo development effort and am the author of Computer Science Logo Style, a trilogy of CS books for teenagers http://www.cs.berkeley.edu/~bh/logo.html.