What the law says: IDEA

IDEA Definition: 300.5 Assistive Technology Device

(1) Assistive technology device.
(A) In general. The term ‘assistive technology device’ means any item, piece of equipment, or product system, whether acquired commercially off the shelf, modified, or customized, that is used to increase, maintain, or improve functional capabilities of a child with a disability.

IDEA Definition: 300.6 Assistive Technology Service

(2) Assistive technology service. The term ‘assistive technology service’ means any service that directly assists a child with a disability in the selection, acquisition, or use of an assistive technology device. Such term includes–
(A) the evaluation of the needs of such child, including a functional evaluation of the child in the child’s customary environment;
(B) purchasing, leasing, or otherwise providing for the acquisition of assistive technology devices by such child;
(C) selecting, designing, fitting, customizing, adapting, applying, maintaining, repairing, or replacing assistive technology devices;
(D) coordinating and using other therapies, interventions, or services with assistive technology devices, such as those associated with existing education and rehabilitation plans and programs;
(E) training or technical assistance for such child, or, where appropriate, the family of such child; and
(F) training or technical assistance for professionals (including individuals providing education and rehabilitation services), employers, or other individuals who provide services to, employ, or are otherwise substantially involved in the major life functions of such child.

IDEA 300.105 Assistive Technology

(a) Each public agency must ensure that assistive technology devices or assistive technology services, or both, as those terms are defined in Sec. Sec. 300.5 and 300.6, respectively, are made available to a child with a disability if required as a part of the child’s—
(1) Special education under Sec. 300.36;
(2) Related services under Sec. 300.34; or
(3) Supplementary aids and services under Sec. Sec. 300.38 and 300.114(a)(2)(ii).
(b) On a case-by-case basis, the use of school-purchased assistive technology devices in a child’s home or in other settings is required if the child’s IEP Team determines that the child needs access to those devices in order to receive FAPE.

IDEA 300.324.a.2.v Development of IEP

In developing each child’s IEP the Team must consider this special factor: whether the child needs assistive technology devices and services.