I've seen a ton of resources along these lines from professional development for teachers to books to bullet lists. Differentiation is very buzzy right now; if it is in the mind of your district things can be much easier. Acceleration is mapped out and sold pretty clearly in "A Nation Deceived."
One concept I've rarely seen emphasized and that may be one of the biggest key differences between the typical student population, high achievers, and the intellectually gifted:
Extrapolation - Less is often more as a gifted learner will typically connect A to C without being told about B. If they make that connection themselves, they'll learn it deeper and better and may even bring fresh insights to the table and figure out D and E as well. Iterating on A, B, C will serve them far less well.
