Microsoft's Bing is headed to the classroom in a more targeted form, with Redmond announcing this morning a new version of the engine dubbed, "Bing for Schools." The initiative takes the standard Bing search engine and cuts all adverts in search, filters "adult content" (the specifications of that are murky) adds more privacy protection, and adds, "specialized learning features to enhance digital literacy." Schools can opt-in on a per-case basis, and opting-in