This flow chart is a concept map of effective Differentiated Instruction. It 'unpacks' the concept of differentiation by showing the key elements in the concept and relationships among those elements. Someone who practices 'defensible differentiation' attends to all of the elements and understands the impact that one element has on all of the others. No one—no matter how good a teacher—can be perfect in all aspects of the model all of the time. The goal is not perfection, but rather to continue deepening one's understanding of the elements and to continue expanding one's capacity to plan and teach with the elements in mind.