This paper describes development and piloting of a self-report measure of teachers' readiness to implement evidence-based programs. Using mixed methods, this project proceeded in two phases. In the first phase, a program-independent self-report measure of readiness to implement was developed and piloted with N = 53 teachers. Results of quantitative analyses offer initial support for the structure and utility of this scale. In the second phase, qualitative interviews were conducted with a subset of the overall sample in order to more thoroughly understand teachers' experiences of readiness and implementation. Together, results contribute to further scale development and offer preliminary support for the validity of this measure in assessing readiness.