Foundations of School Psychology and Professional Practice
This domain tests how the profession defines itself: the NASP Practice Model, the history and law that shaped service delivery, and the professional behaviors expected of a school psychologist.
How practice is organized
The NASP Practice Model names ten domains of practice. Two - data-based decision making and consultation/collaboration - permeate all service delivery. The rest describe direct and indirect services (instruction, socialization, mental health, family–school partnerships, diversity, research and program evaluation, legal/ethical practice) plus the foundations that support them. Service delivery should be multitiered, blending Tier 1 support with Tier 2 and Tier 3 intervention rather than testing alone.
NASP recommends roughly one psychologist per 500 students (1:1,000 where comprehensive services are needed). That figure is a recommendation, not a legal mandate. State certification or licensure authorizes practice; NCSP is a national credential requiring a NASP-approved program, a 1,200-hour internship, and passing the Praxis School Psychologist exam.
Historically, Witmer's 1896 clinic and PL 94-142 (1975) created the test-and-place role; RTI, PBIS, and later federal law pushed the field toward prevention and problem solving. The NASP and APA ethics codes require informed consent, confidentiality with defined limits, competence boundaries, and avoidance of multiple relationships.
Worked example
A district proposes assigning its only psychologist to eligibility testing three days a week. The defensible counter uses the practice model: this allocation eliminates the prevention and consultation domains and weakens crisis response. Present protected time for Tier 2 intervention, consultation, and crisis work, and argue from student outcomes.
Traps
- Treating the 1:500 ratio as statute.
- Equating the role with testing.
- Confusing the state credential with NCSP.