I remember when I took my first photography class and I had a bridge camera, Nikon P90. It was not sufficient for me then, because it is a camera with basic things, you can't switch lenses, so you can't pursue very good image quality. However, it depends what you are searching for, what type of class you are taking (for very beginners or you will reach intermediate skills too)... Too much to consider. Although, if you like to take over photography as a serious hobby, you may consider investing your money in a semi-pro camera, like Canon 550D or Nikon D90. I personally own a Canon 550D, which is great! You can use several types of lenses, it has adequate features to shoot with, it is not very big and it is very easy to use, especially when you get used to its settings. If you are eventually not sure what camera brand to go with, www.lenshero.com is a very good website that will help you, in case you want to have a look at the specifications. You can even compare several camera bodies and see the pros and cons of each.
Finally, bear in mind that once you start with one model, like Nikon or Canon, you will get used to its own settings, and you will be investing on lenses compatible only with one brand. In this case, it would not be neither financial wise to switch brands, or easy for you to learn a new manual of operation. Therefore, my advice is to stuck on a brand and invest on it, rather than switching from one brand to another. After all, remember that there is NOT a PERFECT camera.
Hope that helps you decide!