On July 24, 2023, the Office of Special Education Programs (OSEP) of the U.S. Department of Education (US ED) released a Dear Colleague letter (DCL) and lengthy guidance related to the responsibilities states have to oversee the education of students with disabilities in their schools and to ensure that those students are afforded all of their rights under the Individuals with Disabilities Education Act (IDEA). This summary is an interpretation of the guidance and is intended to highlight portions most relevant to districts/schools and the organizations that support them. The guidance addresses the requirements of both Part B (related to school-aged children) and Part C (related to early-childhood services) of IDEA. This document will focus only on the guidance as to Part B.