Based on research by Dr. Kathie Nunley, Layered Curriculum is a student-centered teaching strategy who's "... 3-layer model of differentiated instruction encourages complex thinking and holds students highly accountable for their learning."
What goes in a layer?
C Layer : : Basic knowledge, understanding. The student builds on his/her current level of core information. B Layer : : Application or manipulation of the information learned in the C layer. Problem solving or other higher level thinking tasks can be placed here. A Layer : : Critical Thinking and Analysis. This layer requires the highest and most complex thought. Create leaders, voters.