While the United States has been fiddling with the implementation of poorly designed accountability systems constructed in anger at our teachers, a large and swiftly growing number of other countries have succeeded in redesigning their education systems to greatly improve student achievement, provide much more equity for vulnerable students and do all this at much lower cost. (ncee.org)
For external recognition Taiwan would need to formally recognized (with an exchange of ambassadors) by a large number of other countries. (politics.stackexchange.com)
In the case of the U.S. dollar, it's because dollars are accepted for goods and services produced in the U.S., are accepted and preferred in a great number of other countries, and because U.S. taxes are paid exclusively in dollars. (realtormag.realtor.org)