So...Whos up on the stock markets???

Needing some consulting here....In my economics class we just started a stock market simulation that uses the real stocks. It is a state-wide deal started off today and ends in 10 weeks. In the end there is cash prizes for the winning teams from the county...and another for the state.
Anyways, since its only 10 weeks we are in need of stocks with a lot of flexibility. Each team starts with $100,000 to "invest." So far my team has invested about 48,000 of it in 3 stocks...Boeing, Exon, and Ebay.
Basicaly our plan is to buy large amounts of shares and sell out as soon as they gain at least $1.25. Since this is only 10 weeks long we want stocks that are up and down daily by at least $1. Though Boeing is my personal choice for the one long term investment (roughly $12,500)
So...who has any ideas as to the best to buy into?...We know the oil companies are changing drasticaly it seems. So trying to keep track over a couple of days and see just how it goes. Once bought we can not sell them till the next day...so no day trading :-/
Anyways, since its only 10 weeks we are in need of stocks with a lot of flexibility. Each team starts with $100,000 to "invest." So far my team has invested about 48,000 of it in 3 stocks...Boeing, Exon, and Ebay.
Basicaly our plan is to buy large amounts of shares and sell out as soon as they gain at least $1.25. Since this is only 10 weeks long we want stocks that are up and down daily by at least $1. Though Boeing is my personal choice for the one long term investment (roughly $12,500)

So...who has any ideas as to the best to buy into?...We know the oil companies are changing drasticaly it seems. So trying to keep track over a couple of days and see just how it goes. Once bought we can not sell them till the next day...so no day trading :-/