The first part of the guide summarizes the expert workgroup’s thoughts about the purposes, use, and implications of quality measurement, and highlights important equity issues for educators and policymakers to consider when making decisions about measurement. It is also a firm reminder that true quality cannot exist without a commitment to equity. The second part looks specifically at the Principles of Ideal Learning framework and examines how each principle aligns with existing quality measures. The second section and the attached appendix provides useful information about the current state of measurement and available tools. (author abstract)