Microsoft is rolling out a custom version of Bing this week tailored specifically for classrooms. School administrators can enable an ad-free version of Bing with always-on SafeSearch — Microsofts web security and adult content filtering — and daily literacy lesson plans. A pilot program kicked off last August and more than 4.5 million children in more than 5,000 schools have been using the special version of Bing ever since. Today’s roll out means any school in the US can sign-up to enable Bing in the Classroom. Microsoft clearly wants schools to move off Google