Math Resources
If you don’t have a basic understanding of 2D and 3D math for computer graphics your head will probably explode once you try learning OpenGL. To prevent that from happening you should at least understand the terminology, and the reasons why this math is needed. No need to grind through math problems like in college.. that’s what computers are for.
1. The Black Art of 3D Game Programming Chapter 10 This is a great introduction to graphics math, and really tells you what you need to know about 3D math without getting into what doesn’t really matter. What I really love about this book is that unlike most similar books this is not a textbook, but rather designed for personal learning which makes a huge difference.The whole book can be found here for free. It is an old book, but the math still holds true.
2. Vector & Matrix Math Tutorial If you feel that everything in the resource above is flying above your head then you probably will want to take a look at this. I normally wouldn’t reccomend a resource that brags about being "book sized", but it is very good.