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. The data show that large percentages of children continue to show greater than expected gains, and large percentages of children continue to leave the programs with age expected skills. There has been little year-to-year change in the numbers, which speaks to the stability of the data. However, we continue to see fluctuation of the numbers within states. The number of states submitting high-quality data has more than doubled since 2008, but states are still building the capacity to collect valid and reliable data.