The correct answer is a school psychologist.
A school psychologist is a specific type of child psychologist that works in the educational system. Their job is to work with individual students or groups of students to help them with any emotional/behavioral problems, academic difficulties, disabilities, and so forth. They also work with teachers and parents to develop techniques to deal with specific home and classroom behavior that a student is displaying that might be seen as a problem. They are solely focused on the mental well being of the students. If they felt that a child might need to be placed in a special education class they would be the one administering such tests.