Mr. Brown's Economics Class:

The Stock Market Game!   http://www.stockmarketgame.org/

log in with your team log-in and password

Other sites to use for information on stocks and investing:

http://www.stockwatch.com/  provides information without any ads
http://money.cnn.com/    massive amounts of information on all aspects of the markets
http://www.kiplinger.com/magazine/contents.html  online version of the investment magazine
http://finance.yahoo.com/  free stock quotes, up to date news, portfolio management resources