In February 2023, the National Center for Special Education Research (NCSER) in the Institute of Education Sciences (IES) convened a technical working group (TWG) panel of experts on the K-12 special education teacher workforce, including state- and district-level education leaders, teacher educators, researchers, and technical assistance providers. The goal of the TWG was to identify ways research can be used to better prepare, support, and retain an effective K-12 special education teacher workforce and how IES can best support this research. The discussion was centered around pressing problems, research needs, and data on the K-12 special education teacher workforce.