The Individuals with Disabilities Education Act (IDEA) funds programs providing services designed to assist children with a range of delays and disabilities in achieving individualized developmental and functional goals. There are two types of programs. Part C Early Intervention is for children ages birth-2, and Part B Preschool is for children ages 3-5. States report data annually to the Office of Special Education Programs (OSEP) in the U.S. Department of Education on three child outcomes for Part C and Part B Preschool programs: (1) Social Relationships; (2) Use of Knowledge and Skills; and (3) Taking Action to Meet Needs. For Part C Early Intervention, a comparison of national averages from FFY 2019 to FFY 2020 showed increases in some outcomes and decreases in others. For Part B Preschool, there was no change in the percent of children exiting at age expectations in Social Relationships from FFY 2019 to FFY 2020, and a decrease in national averages in all other outcomes. State Part C and Part B, Section 619 annual performance reports provided key reasons for declines, including impacts of COVID-19, other data quality issues, and changes to state data collection methods. Further analyses, particularly at the state and local level, are needed to understand trends.