There are pages about using the game in a teaching setting here:
http://www.ug.cs.usyd.edu.au/~csled/biwf/robocode/intro.html
and here:
http://www.ug.cs.usyd.edu.au/~csled/biwf/robocode/guide.html
but I think that the original articles at IBM developerWorks were in many ways intended as an aid for the so-called samouk, rather than for classroom use.
-nm