Wall Street Journal Guide to understanding money and investing is good.
WSJ has a whole series of easy-read, illustrated guides that are pretty good.
I'd also recommend subscriptions to:
Smartmoney and/or Kiplingers -- they can sometimes be had for free or cheap from that free-magazine whatever.com site that you can probably search ATOT or ATfreestuff or ATHD for.
You could check out their respective websites -- as well as most major mutual-fund company websites like troweprice, charles schwab, vangard, etc.
Most of them have 'educational sections' on their sites which are a pretty good overview.
Other worthy sites are: clearstation.etrade.com, morningstar.com, aaii.org
Maybe pick up a weeks worth of WSJ or Investors Business Daily at the newstand.
I'm an aaii.org (American Association of Individual Investors) member -- and highly recommend them. They publish ~10 real issues/yr and they are very well written and thorough. Each issue usually has something good for beginners through intermediate+.
I've been a member for ~10 years so far and am still pleased with them.
If you've got a brokerage house in your city, call them and see if they have any free (or cheap) seminars. I used to work in downtown Seattle and there was one in the same building I worked at and they put on lunch-time seminars. It was 10% sales-pitch, 90% good general talk. Well worth the free admission (and I think they threw in lunch, iirc).
If you are really interested, take Accounting. When I was in college, we went over GE's Annual Report in detail and it was a great help in understanding business financials.
good luck