A study evaluated the Early Childhood Resources Teacher Training Project (TTP). The purpose of the TTP is to train preschool and early primary grade teachers in developmentally appropriate practices. The evaluation sought to: (1) determine the extent to which teachers undergoing training were able to understand and implement the content of the TTP; (2) assess the impact of training teachers in developmentally appropriate practice on the children they teach; and (3) measure the effects of training on the participants' colleagues, school administrators, and schools. Six case studies were initiated when a new group of teachers began a 2-year training cycle. Each teacher worked at a different school, with a proportionate number teaching kindergarten and first grade. The findings of the study suggest that teachers' participation in the training influenced their classroom practices, children's engagements in the classroom, and the teachers' school administrators and colleagues. Overall, the evaluation demonstrated that the TTP has important knowledge for schools and teachers interested in implementing a developmentally appropriate approach in their educational program. (Six appendices include a draft of the Early Primary Practices Observation Scale; interview questions for the teachers, administrators, and colleagues; and observational indicators of children's engagement.) (SW)