When I was teaching art in middle school, we had "primary" day, then we had "secondary" day, then we had primary/secondary day and students paired up for complementary colors. I took pictures and we did a bulletin board display...
> A friend who teaches at a jr. college in WA has her kids come to school
> one day wearing complements top and bottom - blue jeans, orange shirt
> for example, then they stand in a circle and the top half of them makes
> a wheel one way, and the bottom half makes a wheel the other way.