Allying with Great Lakes Higher Education Corporation may be a Superior way to pay for college. The corporation is one of the nation's largest student loan servicers and is the designated student loan guarantor for Minnesota, Ohio, Wisconsin, South Dakota, Iowa, Puerto Rico, and the US Virgin Islands. The company works with the US Department of Education, 1,100 US lenders, and more than 6,000 colleges, universities, and schools. Great Lakes Higher Education Corporation does not originate loans, but guarantees them and collects on them on behalf of lenders. Its Loan Services unit acts as a service provider and Great Lakes Higher Education Guaranty serves as its affiliated guarantor.