Task analysis refers to the sequential steps necessary to complete a task. It also includes any other unique factors involved in or required to perform the task. Task analysis emerged from research in applied behavior analysis. Task analyses break complex skills or series of behaviors into smaller, teachable units.

Termination of services refers to the discontinuation of special education services.

Therapeutic facilities refer to locations where therapy and support services are provided in accordance with state and local regulations and authorization.

Toilet training or potty training refers to the process of training a child to use the toilet for elimination of bodily waste. For many children, this process is usually completed by three years of age. Cultural factors, developmental delays and/or disabilities play a large part in this process.

Tourette Syndrome or TS is a neurobiological disorder characterized by repetitive, stereotyped, involuntary movements and vocalizations called tics. The early symptoms are almost always noticed first in childhood, with the average onset between the ages of 7 and 10 years. Although Tourette Syndrome can be a chronic condition with symptoms lasting a lifetime, most people with this condition experience their worst symptoms in their early teens, with improvement occurring in their late teens and continuing into adulthood.

Transition planning is a process to help children who are approximately age 3 years of age, transition out of the Early Intervention Program by determining the child's needs for educational planning at the preschool level.

Transition services mean a coordinated set of activities for a student with a disability, to facilitate the student's movement from home to an educational environment or from one educational environment to another. The coordinated set of activities must be based on the individual student's needs and take into account strengths, preferences and, where appropriate, individual interests.

Twelve-month special service means a special education service and/or program provided on a year-round basis for students determined to be eligible and whose disabilities require a structured learning environment of up to 12 months duration to prevent substantial regression.

Verbal Behavior or VB is the behavioral analytic approach to analyzing, teaching, and understanding language as theorized by B.F Skinner. Verbal behavior theory explains language as it would any other observable behavior; as such, it is subject to the same principles that govern all behavior. It focuses on teaching verbal behaviors (language skills) through a collection of highly effective teaching procedures taken from the science of behavior analysis. VB has been successfully used to teach functional communication to individuals with Autism Spectrum Disorders or ASD and other developmental disabilities. In Verbal behavior, all aspects of functional communication are divided into smaller teachable components that utilize motivation and reinforcement to teach echoics, mands, and tacts, intra-verbal and other more complex verbal operants.

Vision pertains to the sense of sight.

Vision services involve the detection of visual disorders or delays and
provide services and training to those affected with these conditions.

Visual disorders or Visual impairment involve the impairment of the sense of sight. These deficits require assistance, adaptations, or modifications.

Visual-motor skills involve the ability to coordinate one's eyes with the movement of the hands and the process of thinking.

Visual perception refers to the ability to discern likeness and differences in colors, shapes, objects, and words.

Voice disorders refer to a group of problems involving abnormal pitch, loudness, or quality of sound. Distortions in vocal quality are characterized as sounding harsh, hoarse, breathy, hyper-nasal, or hypo-nasal.