Pearson Education dishes out homework to kids and grown-ups alike. As the world's largest educational publisher, the company prints textbooks, workbooks, and other materials for the K-12, higher education, and professional markets. Noteworthy academic imprints include Addison-Wesley, Longman, Allyn & Bacon, and Prentice Hall. Pearson Education's professional imprints publish technical books, certification materials, and courseware. The firm also has electronic testing and assessment and skill development holdings. Pearson Education is the largest part of the UK-based media group Pearson plc, which in 2008 expanded significantly when it acquired two of Reed Elsevier's Harcourt Education units for $950 million.