Valerie Strauss posted an article about the lobbying activities of the giant testing corporations. They spend many millions of dollars to ensure that Congress and the states understand the importance of buying their services. It would be awful for them if any state decided to let teachers write their own tests and test what they taught.

The four corporations that dominate the U.S. standardized testing market spend millions of dollars lobbying state and federal officials — as well as sometimes hiring them — to persuade them to favor policies that include mandated student assessments, helping to fuel a nearly $2 billion annual testing business, a new analysis shows.

The analysis, done by the Center for Media and Democracy, a nonprofit liberal watchdog and advocacy agency based in Wisconsin that tracks corporate influence on public policy, says that four companies — Pearson Education, ETS (Educational Testing Service), Houghton Mifflin Harcourt, and…