Honestly , for a 1% return on a 6mos CD, I doubt Id even bother. On $1000, that only $10. If you need to take the money out for the maturity for any reason, you can't w/ a CD and may have to pay penalties.
Basically I would say, its a hell of a time to be buying stocks right now. Actually 2009 was the best year for stocks we will prolly see in our lifetime (on a broad basis,) however, that doesn't mean the market has a way to go this year if the economy keeps getting better. You can do quite well over 6mos, but only put up money you are willing to
loose. Its always a option no matter what stock you buy, so be careful.
However, if you can start investing and saving money at your age, I can't stress how much you will be ahead you will be once you get out of college and start looking for jobs and maybe a house. Many college kids make the mistake of running up huge debts while they are in school, (CC or otherwise) and get out of school with thousands in debt, and end of having to pay that back well through their 20s and 30s. That means they have trouble getting house loans, let alone saving for retirement and gaining all those benefits of compound interest. This is esp true in expense areas of the country like the East coast or CA. I have a lot of colleagues in their early 30's who still live at home as they are still paying debt from college and can't afford to buy houses in expensive NJ area.
So, there are all sorts of ways you can go about investing. Scottrade or other such online service is good, but you kinda need to know what you are doing. You can go to a brokerage and get a broker for some personal help, but trading fees are much higher, but may be worth the cost to avoid doing stupid things and getting recc's on stocks and trading. The timeframe you are working on is pretty tough, who knows what thigns are going to be like in 6mos really, but if you can hold on to the money for a longer term, you can realize some fantastic gains. Doubling you money over a few years is not unrealistic.
In the meantime, if you want to play our
stock market game for fun to get an idea of what you are doing, its fun and no cost. :) Lutach is the man.