Vancouver, WA - August 24, 2005 Promissor®, Inc., a leading high-stakes assessment provider and subsidiary of Houghton Mifflin Company, and LaserGrade, LP, announced today that Promissor has signed a test delivery agreement with LaserGrade, the largest U.S.-owned and operated computer-based testing network in North America. Promissor will begin using LaserGrade’s premium test center channel to broaden and extend its own network of secure computer-based testing sites dedicated to professional licensing and certification.

The agreement immediately makes select LaserGrade test centers available to Promissor’s clients, adding greater convenience for candidates across the country that wish to test in a secure, distraction-free environment conducive to professional licensure. LaserGrade’s premium test sites are primarily located in higher education institutions where security and a professional test environment are essential. Adding the LaserGrade sites to Promissor’s network increases coverage in all 50 states.

Promissor will publish and deliver examinations to LaserGrade test centers, utilizing its best-in-class technology that currently registers, manages and delivers high stakes examinations to over 4,000 locations globally. LaserGrade has upgraded its premium centers with Windows® hardware and software. Promissor will train and certify proctors. Candidates will have access to the Promissor Web site and toll-free registration services. Additionally, Promissor’s software allows candidate registration at all test centers. All testing sites are committed to providing high levels of security and client satisfaction, and the unique services required for high-stakes testing and professional licensing.

Promissor is a recognized industry leader in providing high-quality, innovative software applications and professional services in the high-stakes assessment marketplace. Promissor’s market-leading presence in the high-stakes, test delivery business for regulatory agencies, professional associations and corporate clients in the U.S. and around the world is well established. For almost 25 years, Promissor has been providing state-of-the-art testing and certification solutions across a broad spectrum of industries, both within the U.S. and internationally. LaserGrade, with secure computer-based testing centers across the United States and Canada, is the largest United States owned and operated network in North America and has been providing test administration services for over 10 years.

“This agreement perfectly complements the existing offerings of both organizations,” said Judith Moore, President and CEO of LaserGrade. “With Promissor expanding their testing network, candidates will be able to test conveniently, closer to their homes or businesses. We are pleased to be associated with Promissor, a leader in test development and test delivery.”

ABOUT LASERGRADE

LaserGrade, with secure computer-based testing centers across the United States and Canada, is the largest United States owned and operated network in North America. Headquartered in Vancouver, Washington, with a satellite office in Newtown, Pennsylvania, LaserGrade offers proctored computer-based test administration for licensure and certification examinations using its own secure network and software. For lower stakes testing, such as practice tests, pre-tests or after-tests, candidates may test via any computer by logging on to LaserGrade’s secure web-browser.

For more info, visit: http://www.lasergrade.com

ABOUT PROMISSOR

With offices in Philadelphia, Chicago, and London, Promissor is an industry leader in providing secure, valid and reliable licensing and certification examination programs and support services for its clients. Promissor is the only provider with the expertise to deliver a scalable, integrated suite of products and services that meets business requirements for assessment, licensing, credentialing, and e-Government. A Houghton Miffliin company, Promissor has almost 25 years experience serving regulatory agencies, healthcare organizations, professional associations, major employers, and IT corporations.

For more info, visit: http://www.promissor.com