In differentiating instruction according to the principles of UDL, there are many opportunities to challenge our more advanced learners with questions, activities, etc. Keeping them engaged poses a challenge if/when the rest of the class is not grasping a concept. I saw this idea on Pinterest and thought it was a good one. You could put review questions, more rigorous word problems, debate topics, journal topics, etc. Extra credit?https://www.pinterest.com/pin/450078556492175204/