exposure

Recently I went on a trip and I took over 1500 picture. But,... most of the pictures came out too bright or too dark because I lack knowledge of exposure.

Can you give me any tips or any good links that has tutorials on exposure?

Well here are a few.

Print them, read them, study them, practice them till you know the material in your bones.

This looks like a good entry level primer, with examples:
http://www.trustedrevi​ews.com …rial-Exposure-Metering/p1

Very thorough with lots of examples:
http://photo.net …king-photographs/exposure

Be sure to look at ALL the topics on the above link:
http://photo.net/makin​g-photographs/

Though this was written in the time of film, it tells you everything about everything about everything about the technical aspects of photography. Save it for when you are really hungry for more:
http://www.tpub.com/co​ntent/photography/1420​9/

Rad

Another entry level that explains it well:
http://blog.richnetapp​s.com …sure&more=1&c=1​&tb=1&pb=1

And this looks like a nice essay on photography in general, that I am linking here so I don't lose the link:
http://www.varp.net/ph​otos/altindex.html

Here's a good starting point for exposure. Pick the aperture or shutter speed you want & set it in "M". Then you only need to adjust the ISO to get the other setting, aperture or shutter speed, that you want.

Need an exposure crutch?