I've been through many school bus designs in the past, but this is the first time I've been properly satisfied with one, certainly where proportions are concerned.

Aside from the more common hooded design, I later built a flat-fronted version to add some variety to a bus yard I was making on Foxshot.
After taking the screenshots I realised that versions of this design I've used elsewhere have the roof all one colour, and I accidentally left out the top lights on the back of the hooded bus - this can be easily fixed with Worldedit.