Martinson, Karin, and Asaph Glosser (2022). Washington state’s Integrated Basic Education and Skills Training (I‑BEST) program: Six-year impact report, OPRE Report #2022-64, Washington, DC: Office of Planning, Research, and Evaluation, Administration for Children and Families, U.S. Department of Health and Human Services. Available at https://www.acf.hhs.gov/sites/default/files/documents/opre/i-best-6-year-report-mar-2022.pdf