The Juniper Gardens Children's Project at the University of Kansas partnered with two Early Head Start (EHS) programs to develop and validate two measures: one for monitoring children's growth in communication and one for monitoring change in parent's responsiveness toward children. Participants included 175 EHS children and families who were involved in longitudinal studies examining the concurrent and predictive validity of the proposed progress-monitoring measures. Following the development of these measures, project staff developed and tested an infrastructure for helping sites become self-sufficient in using data from the new measures to make program decisions at the program and individual child and family levels. Finally, project staff developed a website that provides support for training EHS staff on the measures and for using the data to make individual and program level intervention decisions. This project resulted in were two new measures that have been carefully developed within the EHS context, and that have been examined for their validity and reliability. The assessments are related conceptually and empirically to children's readiness for preschool, and have demonstrated utility when implemented by EHS program staff.