If you haven’t heard of Pearson, perhaps you have heard of one of the publishers they own, like Adobe, Scott Foresman, Penguin, Longman, Wharton, Harcourt, Puffin, Prentice Hall, or Allyn & Bacon (among others). If you haven’t heard of Pearson, perhaps you have heard of one of their tests, like the National Assessment of Educational Progress, the Stanford Achievement Test, the Millar Analogy Test, or the G.E.D. Or their data systems, like PowerSchool and SASI. 
In a little over a decade, Pearson has practically taken over education as we know it. Currently, it is the largest educational assessment company in the U.S. Twenty-five states use them as their only source of large-scale testing, and they give and mark over a billion multiple choice
tests every year. They are one of the largest suppliers of textbooks, especially as they look to acquire Random House this year. Their British imprint EdExcel is the largest examination board in the UK to be held in non-government hands.