Schools themselves have a nightmare with scheduling the general curriculum i.e. what teachers/classes/hours will fit the number of kids in each year whilst taki

Schools themselves have a nightmare with scheduling the general curriculum i.e. what teachers/classes/hours will fit the number of kids in each year whilst taking into consideration their credit requirements (I am talking k-9 here). I think your approach of allowing the user to see the various permutations rather than trying to suggest the exact best solution is pragmatic and interesting (as what I am speaking about above is essentially a 3d bin packing problem).