Recently, the folks over on GOOD magazine's blog asked the question: Which class in high school or college impacted you the most? Why?
Now, I was a bona fide school fanatic -- three degrees over nine years, and I'd still be in school if I hadn't realized the need to make a living at some point! So, I've taken a lot of classes, with lots of teachers and loved a bunch of them (both classes and teachers). Nevertheless, my answer was clear: social psychology.
Why? This class, which explored the interactions of people with each other, within and outside of groups, was probably the single course that changed my everyday interactions with people at home and at work in the most ways.