Microsoft has launched a new ad-free search product, Bing for Schools, with an incentive program that rewards schools with free Surface RT tablets, ZDNet reports. The new pilot program, currently for the US only, offers schools a search engine tailored for education, and to encourage interest in joining it, Microsoft is integrating its incentive program, Bing Rewards, which will let schools earn Surface RTs. Given the dissatisfaction that older Windows users seem to have with RTs lack of backwards compatibility, younger students may be one group that have fewer objections to its limitations, and give Microsoft a chance to put its spare Surface RT inventory to good use…