CGIAR’s communities of practices on Monitoring, Evaluation, and Learning (MEL) and Impact Assessment (IA) held their annual meetings together in Amsterdam on 2-4 October 2019. The theme of the joint meeting was “Scaling, Impact, and Benefits of CGIAR Research—Towards 2021.” A total of 57 people participated, representing all 12 CRPs, 2 Platforms, 11 Centers, SMO, SPIA, CAS Secretariat (evaluation workstream) and several external organizations.