The American Dental Association (ADA) is the most authoritative dental organization in the United States. It was established in 1895 and is headquartered in Chicago. It aims to improve national dental health and promote high-level professional service standards. Its main responsibility is to evaluate and Accredited dental training schools and dental health schools. ADA also publishes the monthly magazine "Journal", the monthly magazine "Dental Teamwork" and the weekly "ADA News".