Background/Objectives: High-quality inclusive education is important for promoting the positive development of children with disabilities in early childhood care and education (ECCE) settings. However, ECCE teachers may not have the knowledge and skills to manage challenging behaviors in young children, especially those with disabilities. Infant and Early childhood mental health consultation (IECMHC) is one mechanism to support the professional development of teachers. This study explored the impact of an evidence-based IECMHC program, Jump Start Plus COVID Support (JS+CS), on outcomes for teachers in classrooms including children with disabilities. Methods: Utilizing a RE-AIM framework, we examined the extent that JS+CS impacted teacher outcomes related to classroom practice and teacher attitudes after the initial intervention period. In addition, we examined the extent that the classroom children with disability ratio moderated the impact of the intervention on teacher outcomes. Using a cluster randomized controlled trial in a sample of 138 racially and ethnically diverse teachers in 31 ECCE centers, we examined the reach, effectiveness, adoption, and implementation of JS+CS. Results: The results indicate that the JS+CS program shows promise as an intervention to support ECCE teachers working in classrooms with children with disabilities, particularly in improving teacher safety practices, behavior management skills, and resiliency coping. In addition, the program was adopted equally in classrooms that served children with and without disabilities. Conclusions: This is a unique contribution to the literature given that no previous IECMHC programs have examined adoption in classrooms serving children with disabilities. Further investigation is needed to determine the specific factors that impact program implementation considering that this study was conducted during various phases of the COVID-19 pandemic.
