In our classes we are having a friendly competition using the stock market. Using the web site 'E-trade' students invest approximately $30,000 in several types of stocks. Each day we check their market action and buy or sell at least three times a week. In our math class we discuss the importance of percents, fractions, decimals and other areas of math and how they relate to the market. I have found students to be highly motivated with this lesson, mainly because it is dealing with money and class competition.