Senate Report 117-39 and House Report 117-118 include provisions for Government Accountability Office (GAO) to assess professional learning at the Department of Defense Education Activity (DODEA) schools. This report describes: DODEA's professional learning approach, results of DODEA teacher surveys, and how DODEA has addressed barriers teachers anticipated when implementing professional learning in the classroom. GAO analyzed about 130,000 closed-ended responses from DODEA's professional learning teacher surveys that covered summer 2018 through the end of 2021, the most recent period available. GAO also analyzed a nongeneralizable sample of open-ended survey comments on anticipated implementation barriers for the 2021-2022 school year, the most recent period available. In addition, GAO reviewed relevant federal laws, regulations, and agency guidance, and interviewed agency officials. GAO held four discussion groups with DODEA officials, which were selected for their familiarity with professional learning at DODEA, and held a separate civilian discussion group with professional learning specialists familiar with DODEA's professional learning standards.