What Does the First Lady Do?

My school is all a abuzz since Michelle Obama is coming to my school on Friday to preview an episode of iCarly (my own children would love to see that part!).  For a government teacher it marks a perfect example to talk about the role of the first lady as well as Michelle Obama's role in her husband's re-election.  This site has a great several page write-up of the first lady's role (and in general "How Stuff Works" has a lot of helpful videos).   Obama does not get paid for her job, but she does have a paid staff which is housed in the east wing of the White House and, of course, a website.