Microsoft has come up with a clever way to get rid of some of the millions of excess Surface RTs it has in its warehouses: It’s giving them away to schools who agree to use a safe, ad-free version of Bing as their primary search engine. As AllThingsD notes, Microsoft is telling schools that sign up for the program that they’ll have to “use a special edition of Bing that’s free of advertising and outfitted with enhanced privacy protection measures and adult-content filters” before they get free tablets. The one-two punch of pushing Bing and the Surface in schools is part of Microsoft’s broader initiative to nudge Google aside as the top search engine for educational institutions.