Section 504 requires that schools evaluate a student believed to have a disability before making an initial placement of the student and before any subsequent, significant change in placement of the student.[1] According to OCR, the exclusion of a student for more than 10 consecutive days, the exclusion for an indefinite period, and the permanent exclusion of a student (expulsion) can constitute significant changes of placement under Section 504. A series of suspensions — each of which is 10 or fewer days in duration, but that creates a “pattern of exclusions” may also be a significant change in placement.[2]