• PPS school psychologists model their practice in accordance with the NASP Comprehensive Model and endeavor to provide a range of services as described in the current standards from the National Association of School Psychologists. School Psychologists function to support students and schools through Consultation, Collaboration, and Assessment. The services provided should reflect the specific needs of the students, families, and schools served. School psychologists are trained in the following areas and use these skills based on the demands and supports available at the school site.