2. It should be enough for a school leader to tell or show teachers how to differentiate effectively. 3. Differentiation is just about instruction. 4. Differentiation is something a teacher does or doesn’t do. 1. Philosophy, way of thinking. Set of principles and fact. 2. Requires teachers to rethink their practices. About trial, reflections, and adjustments. 3. While approach is about instruction, cannot be separated from positive learning climate, curriculum, etc. 4. While some attention is paid to student variation, many teachers do not proactively plan to address student differences in readiness, interest, etc. 8