It is essential that a solid research base be established to provide a foundation that will enable the field of early childhood teacher education to examine whether, for whom, and in what ways teacher education matters. The purpose of this article is to review several important domains in early childhood teacher education to illustrate the characteristics, key features, and significant gaps in current research, and to identify the kinds of research that are most needed to enhance the impact of early childhood teacher education. We conclude by identifying five crosscutting research priorities and describing what is needed to create a supportive environment that produces--and implements--early childhood teacher education research. (author abstract)