The National Association of Teachers of Singing (NATS) is a professional organization for singing teachers, and it is the largest association of its kind in the world. There are more than 6,500 members, mostly from the United States. Additional members are from Canada and over twenty-five other countries around the world including: Australia, Austria, Brazil, China, Costa Rica, Denmark, Egypt, France, Germany, Iceland, Italy, Japan, Jordan, Korea, Malaysia, Mexico, Netherlands, New Zealand, Singapore, South Africa, South Korea, Spain, Switzerland, Taiwan, United Arab Emirates, and the United Kingdom. Source: Wikipedia (en)