Under the Individuals with Disabilities Education Act (IDEA), the required members of an Individualized Education Program (IEP) team include:
- The parent or legal guardian
- A general education teacher
- A special education teacher
- A representative of the school district (often the school administrator or principal)
- Someone to interpret the results of evaluations
- The student (when appropriate)
In your options, while all of them are typically involved in the IEP process, the one that is not explicitly specified under IDEA as a required member of the IEP team is the school administrator or Principal. Instead, it specifies a representative of the school district, which may or may not be the principal.
Therefore, the answer is: The school administrator or Principal.