Which of the following requires the most graduate-level training?

The role of a school psychologist requires the most graduate-level training because it typically mandates a specialist-level degree (such as an Education Specialist, or Ed.S.) or a doctoral degree (Psy.D. or Ph.D.) in school psychology or a related field. School psychologists are trained to provide a wide range of services, including psychological assessments, intervention strategies, and counseling to support the educational and emotional well-being of students. This training encompasses not only theoretical knowledge but also extensive practical experience in both psychological theory and educational practices.

In comparison, the other roles listed such as school counselor, clinical social worker, and teacher assistant may also require significant training but generally do not require the same depth of specialized psychological training as school psychologists. For example, school counselors typically require a master's degree in counseling, while clinical social workers need a master's in social work, both of which, although intensive, may not delve as deeply into psychological evaluations and interventions tailored specifically for educational settings. Teacher assistants often require far less formal training and may only need a high school diploma or some college coursework without the extensive graduate-level training that school psychologists pursue.