This document provides an overview of differentiation in professional development. It defines differentiation as modifying content, process, and product to meet varied learner needs. The document discusses differentiating content by the objectives and how students access material. Process differentiation involves how students make the content their own through various activities. Product differentiation refers to how students demonstrate learning. The document also outlines strategies for differentiation, such as grouping, pre-assessments, choice boards, and learning contracts. It provides examples of differentiated activities and assessments that could be used in professional development.