Abu Dhabi National Academy (ADNA) - school information page.
ADNA not found in Abu Dhabi, or in ADEC school directory (Abu Dhabi Education Council). However job offer letters are being sent to teachers, with a request to pay visa fees, which is not legal in the UAE.
School website is copied from a real school in the USA - the Pan American Academy Charter School (PAACS), but with school name and contact information changed. The real PAACS has no information about an existing or planned school branch in Abu Dhabi (or anywhere else in the UAE).
Reply here if you have correct or updated information about the school.