Vertex Array

I was wondering if someone knows a good turial that teaches the use of Vertex Arrays.
I found some different code-examples that use them but I am confused by various stuff that apparently has nothing to do with the vertex arrays.
A easy tutorial would be really appreciated, thanks!

PS: If would draw 2 cubes with 1 vertex array, would I still be able to rotate those quads individually?

Yes, you still need to rotate the cubes on their own.

Check out