If you add an exercises you should put it in a separate file in the exercises/ directory of the source dir. It also has to be initialised in Mainwin.__init__. See some other exercises for an example on how it is done. The Teacher and Gui class must inherit from a base class in exercises/abstract.py.
If you add lesson files you should put your files in the lesson-files/ subdirectory of the sourcedir before installing. (note: you can write lesson files without knowing any python)
Copyright (C) 2000 Tom Cato Amundsen. This file may be distributed under the terms of the GNU General Public License version 2 or (at your option) any later version.