Dan Blanchard’s,Evaluation of Professional Development in an Urban High School is a must read for school administrators, instructional supervisors, and educators who strive to ensure the success of their students in an increasingly competitive 21st-century global economy. Dan brings to the fore the need for administrators to shift from the traditional role of manager to instructional leader. 21st-century instructional leaders must work collaboratively with teachers to design personalized professional development programs that will enable each teacher to attain success. Hopefully, Dan’s work will help lead to a paradigm shift in the development and delivery of professional development programs for instructional staff and leaders.