On March 11, 2020, the National Center for Afterschool and Summer Enrichment hosted the webinar, “Supporting a Strong Out-of-School Time Workforce: An Introduction to the Out-of-School Time (OST) Professional Development System Building Toolkit.” The toolkit was designed to assist states as they build and strengthen professional development systems inclusive of school-age providers. During the webinar, participants were introduced to the toolkit, which is organized into sections on Foundational Ideas, Career Development System Components, and Supporting and Sustaining the Workforce. They heard from states who are implementing workforce strategies inclusive of school-age, and learned how they can use the toolkit to support their states’ efforts to build a strong workforce.