Looking for a stock to buy for 3 weeks

im participating in a class stock market game (online fake money) and im currently in 4th looking to get ahead before it ends in 3 weeks. I have $53,000 to spend so i was wondering what some good stock were to buy atm. Im only $3,000 down from 1st place and need a stock or 2 that i can dump some money into to get first.