Speech and Language Impairment means a communication disorder in the area of articulation, voice, fluency, or language that adversely affects the child's educational performance.

Traumatic Brain Injury 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 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 apply to brain injuries that are congenital or degenerative, or brain injuries induced by birth trauma.

Visual Impairment means a visual impairment that, even with correction, adversely affects a child's educational performance.  The term includes both partial sight and blindness.