NHA is only registered for state employment purposes in the following states: Arkansas, Colorado, Florida, Georgia, Illinois, Indiana, Louisiana, Maine, Michigan, Nebraska, New York, North Carolina, Ohio, Pennsylvania, South Carolina, South Dakota, Texas, and Wisconsin. Duties and Responsibilities: NHA provides our students with specially designed instruction developed to meet the unique needs of each child resulting from his/her disability such as: a resource room, inclusion, and/or pullout services.