I designed Vector 3 back in 1979, and am releasing it here for free under a Creative Commons "attribution non-commercial" license. Actually, I've made some fairly substantial changes to the game.
Vector 3 is a 3D space combat board game; its virtue is that players learn the essentials of vector arithmetic and Newtonian mechanics by playing. On a number of occasions, people have told me they learned more about this from the game than from lecture courses. I could see using it in the context of a high-school math or physics course.