Disability covers a wide umbrella of conditions.  Usually people think about physical disabilities when the term "disabled" is brought up because that is clearly visible.  However, the mental conditions that affect individuals' performance has raised a new awareness and as educators we need to be cognizant of this.  ADA provides accomodation for the individual to have an equal playing field as non-disable individuals.  For example, if a student has a learning disability or ADHD then extension of time with limited distraction can be approved.  However, it does not guarantee a certain grade for the disabled individual.