Related Services are developmental, corrective, and other services required to assist a student with a disability to benefit from special education. May include transportation and support services such as speech pathology, audiology, psychological services, physical and occupational therapy, recreation, early identification and assessment, counseling, interpreters for persons with hearing impairments, medical services for diagnostic or evaluation purposes, school health services, social work services in schools, and parent counseling and training.

Section 504 is a component of the U.S. Rehabilitation Act of 1973, and protects the rights of individuals with disabilities in programs and activities that receive federal funds from the U.S. Department of Education. Section 504 regulations require a school district to provide a "free appropriate public education" (FAPE) to each qualified student with a disability who is in the school district’s jurisdiction, regardless of the nature or severity of the disability. This may be defined as regular or special education services. Section 504 does require development of a plan, usually referred to as a 504 plan, although this written document is not mandated. The Individualized Education Program (IEP) of IDEA may be used as the 504 plan . Typically, a student who needs 504 services needs accommodations and/or related services but does not need special placement or instruction from a special education teacher. For example, students with ADD or ADHD, who do not qualify under the disability categories of IDEA, often have 504 plans. General education teachers, resource teachers, and speech and language therapists usually provide the additional services.

Speech or Language Impairment (as defined by IDEA) means a communication disorder such as stuttering, impaired articulation, a language impairment, or a voice impairment that adversely affects a child’s educational performance.

Traumatic Brain Injury -TBI- (as defined by IDEA) means an acquired injury to the brain caused by an external physical force, resulting in total or partial functional disability or psychosocial impairment, or both, that adversely affects a child's educational performance. The term applies to open or closed head injuries resulting in impairments in one or more areas, such as cognition; language; memory; attention; reasoning; abstract thinking; judgment; problem-solving; sensory, perceptual, and motor abilities; psychosocial behavior; physical functions; information processing; and speech. The term does not include brain injuries that are congenital or degenerative, or brain injuries induced by birth trauma.

Transition is the set of activities and services that assist students with disabilities to successfully move from the school environment to the post-school environment, such as employment, post-secondary education, or vocational training. These services can include adult education, independent living, and community participation.

Visual Impairment Including Blindness (as defined by IDEA) means an impairment in vision that, even with correction, adversely affects a child’s educational performance. The term includes both partial sight and blindness.