I decide to use GOB, the Geroge Lebl GTK+ builder system, for the Dr Geo MDI child in Dr Genius. So now, all of the MDI child in Dr Genius use the same system, this will make life more easy when it will come to save all in XML. I've also indent the drgeo code to the Gnome style instead of the GNU style.
In France, at the APRIL (french association to promote the GNU philosophy) we are at the point of creating a development group targeted to education. Of course it will use as much as possible Gnome.