A disconnect exists between definitions of school readiness used in research and early childhood education (ECE). While researchers often discuss school readiness as a single, multidimensional construct, the majority of studies operationalize it using multiple measures rather than as one outcome. In comparison, in ECE settings a single measurement tool including multiple dimensions is used. The current study attempted to bridge this gap by examining the factor structure of the Desired Results Developmental Profile (DRDP), a measure of school readiness used in Head Start. We considered often-cited predictors of school readiness (parenting, effortful control) to replicate previous research findings. Analyses indicated a single factor was most appropriate for the DRDP. Measures of parenting and children's effortful control were significant predictors of DRDP scores. Findings from the current study suggest an existing single factor, ECE-based measure of school readiness, such as the DRDP, can also be used as a research tool.