In today’s workplace, the ability to solve complex problems, think critically, and engage in continuous, self-directed learning is essential. Recognizing that providing the kind of education that fosters such abilities necessitated considerable change in its schools, the Archdiocese of Philadelphia’s Office of Catholic Education developed a strategic plan focusing on the 21st-century learner. The plan focuses on three areas for growth: Catholic identity, academic excellence, and sustainability. Within academic excellence, the plan targets transforming classroom practice, emphasizing rigorous and relevant instruction, interdisciplinary learning, and the use of data to inform instruction. Teachers are the linchpins to the plan’s success. Over the years, the Office of Catholic Education has been intentional about its approach to professional development, regularly hosting universal staff development sessions for all of