Well, sir, I salute you and your service to this great country of ours. Welcome to the site.
So you say you want to learn about Boston? It starts with the accent and the slang. First, you need to replace "very" with "wicked". For example, you could say to your students, "That was a wicked good kick." All "r's" will also have to be replaced by "ah's". For example, "He hit the ball fah (instead of far)." Now, combine the two and you get, "Nomah hit tha ball wicked fah." Red "Sox" now has to be said "Sawx".
You also need to sample real seafood, particularly clam chowder. On your trip to Boston, you have to stop at a Legal Seafood at least once; I reccomend making a date out of it. There are at least a half dozen locations in the Boston area and it's by far the best seafood I've ever sampled. No more Rocky Mountain Oysters for you; you need to try some real oysters.
Now, you need to get an Irish friend with the last name Sullivan. Everyone has a buddy, or is named, Sully. It's unavoidable. Hell, I know three Sully's and I'm dating one of them (I can't call her Sully, though, she'll kick my ass).
Off the top of my head, that's all that I can think of. If you've got any questions about being a Bostonian, most of us here would be glad to help. Again, welcome.