Martinson, Karin, Sung-Woo Cho, Asaph Glosser, Karen Loya, and Samuel Dastrup (2021). Washington state’s Integrated Basic Education and Skills Training (I-BEST) program: Three-year impact report, OPRE Report #2021-102, 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/ibest-3-year-report-june-2021.pdf