Professor Nicholas Tampio, via a kind Rebecca Wallace-Segall email:

The multinational software giant, Microsoft, once bundled its Explorer search engine with Windows, and refused, for a time, to have Windows run WordPerfect, a competitor to Microsoft Word. As head of Microsoft, Bill Gates wanted everyone to use the same program. As funder of the Common Core, I believe he wants to do the same with our children.
The Common Core is one of the most effective educational reform movements in United States history. Gates is a financial backer of this movement. Looking at this connection enables us to see why the United States should be wary of letting any one person or group acquire too much control over education policy.
Launched in 2009 and now adopted by 45 states, the Common Core articulates a single set of educational standards in language arts and mathematics. Although the Common Core claims not to tell teachers what or how to teach, school districts must prove to state legislatures or the federal government (via the Race to the Top program) that they are complying with the Common Core. The simplest and most cost-effective way for a school district to do that is to purchase an approved reading or math program.