how about an ACT map. U know, the test? The continents could be the sections math, english, reading and science. It would be arranged like the answer sheet. Every letter under every number would be a territory. One of the answers for each number would be filled in and each one u own is worth two armies or something... The top numbers in one would be able to attack the bottom numbers bottom numbers in an adjacent section. Unless its on the top or bottom.
Just an idea...