Learning OpenGL

I am a brand new learner of OpenGL
Please some one guide me how to develop expertise in it.
I have my summer vacation in which I can give ample time to it.

if you know something about c programming you should read this:

otherwise you should learn a programming language first.

try www.gametutorials.com they have a lot good tutorials there for beginners

and don’t forget NeHe’s OpenGL tuts on

NOT just aimed at gamers, but quite easy.

I have a simple on-line course which you may
find useful at:

Uses GLUT for the interface to your windowing environment.