Dr.Scheme Tutorial
In the beginning of this tutorial, you are told to "choose a language."
When you get to this part, go to the "language" menu, and select "choose language".
Click on "How to Design Programs" (under Teaching Languages) and choose
"Beginning Student.".
The MIT 6.001 Course Notes
6.001 is the grand-daddy of this family of courses. They've just switched to
DrScheme as well, and have some useful tips.