Do you know where the bubbler is? Do you know which city many locals call Cream City? Well, if you're from Milwaukee, like me, you'd know about both of these terms. What local terms does your town use? Do we still have as many local words as in the past, or has the internet made our American language more uniform?
I saw a guest speaker in college who had helped to put together a dictionary of American slang and/or colloquialisms. It was an interesting process of interviewing people to find out the words used in different parts of the country. The book (or similar) is available at your local university library. The Australian one was cool because it was so foreign. The only problem with the actual dictionaries is they are huge and probably mostly boring to kids. This assignment is neither.
If you're teaching a book with language that's different from that of your students, this can be a useful activity. I used it while teaching Catcher in the Rye and To Kill a Mockingbird. Different time and place.
32 questions derived from the actual dictionary. Some might not get much of a response. Some will be the same answers from my students--don't reveal these until the end. See if there are some regional or time period differences.
Google Docs link means you can share with entire class for a chaotic session of answering or allow them to share with smaller groups.