TWO WORLDS UNITED program length of study can range from one week, usually during a domestic break, to an academic year, encompassing a couple academic terms, to an entire degree program that spans several years. The most common are the TWO WORLDS UNITED summer and semester long programs that cover either the spring or fall semester. There are also winter and summer semester programs. The winter semester programs, for public, 4-year universities, are usually more focused on a specific area of the countries culture due to the shortened time students have in the country.