I don't have time to write a big reply, but I've toyed with using it in school. You could have students plan out their rockets instead of going right to test flights. Have a list of the masses of objects, the specific impulse of engines (http://wiki.kerbalspaceprogram.com/wiki/Parts) and have them calculate the delta v expected in each stage. Technically Algebra, but fun nonetheless... One thing I can suggest is downloading the Engineer mod. It gives many variables used in flight. For instance, during the rocket build you can see the delta v of your stages as well as gobs of stats in flight... Group design of rockets is possible too...