Disability-related documentation should provide information about the current impact of the condition in order to determine appropriate accommodations. This information may include assessments, reports, and/or letters from qualified evaluators, professionals, or institutions. Common sources of documentation are health care providers, psychologists, and diagnosticians. Clinicians are generally expected to have an established relationship with the student and should not be related to the student. Evidence of accommodations approved from previous schools such as accommodation agreements or letters, 504 plans, IEPs, and accommodations for standardized exams can also be included as additional supporting information.