It can! Especially if you know about ICivics. This site has sixteen amazing situational games from which to choose. The site covers everything from immigration, to drafting a bill and getting it passed and even a game about constitutional law. All the games at ICivics require a fairly strong vocabulary so this site is probably more geared towards your junior high and first year high school students. But, what a great way to teach your students to be great citizens. The games are intensive and take a minimum of 15 minutes to manuever your way through. Now I realize that many of my readers are from outside the US, but this is a great site for you as well. ICivics can really teach your students what being an American citizen is all about. For my US readers, ICivics also has a teacher section which will help you align the games found on their site with your state standards.
*Disclaimer - with this weekend being the 10th anniversary of the atrocities of September 11th, 2001, I am going to try and gear my posts in a fairly patriotic direction, I hope you understand. I live in one of the greatest countries in the world and am proud to be an American. We will never forget!