The Health Care Institute (HCI), in collaboration with the National Center for Early Childhood Health and Wellness, used a low-literacy train-the-trainer (TTT) approach to train front line staff and parents of children attending Early Head Start (EHS) and Head Start (HS) agencies from diverse communities across the U.S. The focus of this manuscript is to describe the TTT training and the effectiveness of the training in improving knowledge and attitudes regarding child trauma and effective responses to trauma among EHS/HS staff and parents. (author abstract)