Four v. Carter, 510 U.S. 7 (1993), was a case in which the Supreme Court of the United States held that, in certain circumstances, a court may order that parents be reimbursed for unilaterally withdrawing disabled children from schools that do not comply with the Individuals with Disabilities Education Act.

[2] The United States District Court for the District of South Carolina found that public school's proposed individual education plan violated the Individuals with Disabilities Education Act and that placement with private school was appropriate, and ordered reimbursement.

[3] The United States Court of Appeals for the Fourth Circuit affirmed,[4] and United States Supreme Court granted certiorari to resolve a circuit split regarding reimbursement under the Individuals with Disabilities Education Act.

[5] In a unanimous opinion written by Justice Sandra Day O'Connor, the Court held that the parents were entitled to reimbursement.

[9] The Court also held that reimbursement is not barred because private school chosen by the parents did not meet IDEA's definition of free appropriate public education;[10] reimbursement is not barred because private school is not on state's approved list of private schools;[11] and courts may consider relevant factors in fashioning discretionary equitable relief, and total reimbursement is not appropriate if a court determines that cost of private education is unreasonable.