http://www.arcsynthesis.org/gltut/ is really good and the 4th edition of the OpenGL super bible has been declared better then previous and the most recent one, but it is a tad older, but it gets you all the valuable knowledge.
Check out also:
This lecture is still up. Worth check out http://www.cs.cmu.edu/afs/cs/academic/class/15462-f10/www/
Before you do this, make sure you have at least a decent/firm understanding of 3D mathematics. I am currently reading http://www.amazon.com/Interactive-Computer-Graphics-Top-Down-Shader-Based/dp/0132545233 to get some deep knowledge before i completely dive into OpenGL