usa

USA is the global leader in the field of educations. US has extremely flexible education system.

The United States of America (USA), commonly known as the United States (U.S.) or America, is a federal republic composed of 50 states, a federal district, five major self-governing territories, and various possessions.At 3.8 million square miles (9.8 million km2) and with over 325 million people, the United States is the world's third- or fourth-largest country by total areaand the third-most populous. The capital is Washington, D.C., and the largest city by population is New York City. Forty-eight states and the capital's federal district are contiguous and located in North America between Canada and Mexico. The state of Alaska is in the northwest corner of North America, bordered by Canada to the east and across the Bering Strait from Russia to the west. The state of Hawaii is an archipelago in the mid-Pacific Ocean. The U.S. territories are scattered about the Pacific Ocean and the Caribbean Sea, stretching across nine official time zones. The extremely diverse geography, climate, and wildlife of the United States make it one of the world's 17 megadiverse countries

The United States is the world's third- or fourth-largest nation by total area (land and water), ranking behind Russia and Canada and just above or below China. The ranking varies depending on how two territories disputed by China and India are counted,and how the total size of the United States is measured. The Encyclopædia Britannica, for instance, lists the size of the United States as 3,677,649 square miles , as they do not count the country's coastal or territorial waters. The World Factbook, which includes those waters, gives 3,796,742 square miles.