Project LAUNCH grantees are integrating early childhood mental health consultation (ECMHC) into early care and education settings (ECE) and home visiting programs in order to build staff’s capacity to support the social-emotional and behavioral well-being of children and their families. Evaluations of the Project LAUNCH grantees demonstrated that ECMHC in these programs and settings improves staff’s ability to identify and support children with social-emotional challenges, and improves childhood outcomes, including reducing the number of children held back in the second grade and boosting second grade reading scores. This issue brief further examines the impact of ECMHC on children, families, and ECE and home visiting staff based on the Project LAUNCH grantee evaluations, and identifies lessons from this work that can inform the successful expansion of ECMHC services within ECE settings and home visiting programs in other states.