I'm working on some problem sets for a course at the University of Sydney (http://www.weg.ee.usyd.edu.au/courses/ebus5002).
The first problem set that I've written requires the creation of a new edit-this-page template. The goal of this problem set is to learn a bit about the openacs templating system.
Please check out the problem set at http://www.weg.ee.usyd.edu.au/courses/ebus5002/labs/lab4
There will be a few more as the course progresses. If they are worth adding to the OpenACS Problem Sets section, then I can convert them to docbook and submit to OpenACS.