Why do American students call America North American?

The United States is located in North America and is an immigrant country. In the era of great European navigation, large-scale immigration began shortly after the discovery of the new continent of America. At first, it was just a colony formed by immigrants from various countries, but it did not form a country. Later, after independence from European colonial rule, many people living together spontaneously formed a country because they were located in America. This new country is called the United States of America, which is called the United States for short. Call Americans North Americans.