National Association of School PsychologistsThe National Association of School Psychologists (NASP) is a professional association that represents more than 25,000 school psychologists, graduate students, and related professionals throughout the United States and 25 other countries. The world's largest organization of school psychologists, NASP works to advance effective practices to improve students' learning, behavior, and mental health. Our vision is that all children and youth thrive in school, at home, and throughout life.