The concept of "differentiated professional development" means that:
ATraining is tailored to meet the specific needs and experience levels of individual teachers.
BProfessional development programs are designed to address the common challenges faced by most teachers in a school.
CTeachers receive different types of professional development based on their subject area or grade level taught.
DIt means that teachers are given autonomy to choose their preferred professional development activities from a wide range of options.