This is an ongoing activity for students to practice adding and subtracting with integers using the stock market. Students will choose three stocks and decided how much they want to invest of their $5000. What they don't use in the stock gets saved in their "bank". Students then check their stocks periodically (every day, week, or all year you decide how long it is). Students keep track of how their stock is doing in real time. It is a great activity to let them use integers in a real life situation.