Book excerpt: This book is based on the findings of a research project into Reception Teachers' Theories of Play funded by the Economic & Social Research Council. There is strong ideological and theoretical support for a play-based curriculum in the early years. But evidence suggests that teachers find this difficult to translate into practice. The educational potential of play is not realized. This study focuses on nine reception class teachers, ranging from novices to experts, in order to discover their theories of play and how these relate to classroom practice. The data reveal new insights into how they strive to incorporate play into the curriculum in contrasting ways and the constraints they encounter in this process. There is a need to improve the quality of teaching and learning through play. Teaching Through Play makes a valuable contribution to this process.