NEW YORK--(BUSINESS WIRE)--Fitch Ratings affirms all ratings for the outstanding notes issued by National Collegiate Trusts 2006-4, 2007-1, and 2007-2. A detailed list of rating actions follows at the end of this press release. KEY RATING DRIVERS Collateral Quality: All trusts are collateralized by private student loans originated by various financial institutions and lenders and securitized by First Marblehead Corporation. At deal inception all loans were guaranteed by The Education Resources