This document discusses teacher development and continuous professional development (CPD) as key aspects of education leadership. It presents CPD as having two frameworks: 1) types of skills and knowledge teachers should develop (ingredients), including educational, technical, and personal ingredients; and 2) methods of providing development (inputs), including through other teachers, other schools, and experts. The document provides examples of each and advocates for school leaders to create a development plan for teachers that identifies needed ingredients and planned methods to provide development opportunities. Overall, the document emphasizes that development is crucial for education leadership and improving quality education.