Given increasing numbers of young culturally and/or linguistically diverse (CLD) children across the United States, it is crucial to prepare early childhood teachers to create high-quality environments that facilitate the development of all children. The Early Childhood Ecology Scale-Revised (ECES-R) has been developed as a reflective tool to help early childhood teacher candidates examine their beliefs concerning classroom ecology. Using cultural responsivity and classroom management theories as the theoretical framework, the authors posit that the ECES-R identifies five dimensions that promote a high-quality, culturally responsive classroom ecology. These include the sociocognitive, sociocultural, sociolinguistic, socioemotional, and sociophysical dimensions. Evidence for reliability and validity was established. Factor analysis supported the five proposed dimensions, with the identification of an additional dimension: sociocomfort. (Contains 1 table.)