I have shared with fellow teachers a great book on differentiating for all students, including those who are identified as gifted, Making All Kids Smarter: Strategies That Help All Students Reach Their Potential by John DeLandtsheer. He offers many options including using Depth & Complexity Icons. Check out my presentation from the Round Rock ISD Summer Professional Development which is listed below.
We use Kaplan and Gould's icons in our classroom.Â