Section 300.303 - Reevaluations(a)General. A public agency must ensure that a reevaluation of each child with a disability is conducted in accordance with §§ 300.304 through 300.311 - (1) If the public agency determines that the educational or related services needs, including improved academic achievement and functional performance, of the child warrant a reevaluation; or(2) If the child's parent or teacher requests a reevaluation.(b)Limitation. A reevaluation conducted under paragraph (a) of this section-(1) May occur not more than once a year, unless the parent and the public agency agree otherwise; and(2) Must occur at least once every 3 years, unless the parent and the public agency agree that a reevaluation is unnecessary. Authority: 20 U.S.C. 1414(a)(2)