To encourage the voluntary desegregation, districts started developing magnet schools to draw students to specialized schools all across their districts. Each magnet school would have a specialized curriculum that would draw students based on their interests.
Android holds the largest number of installed-base devices, with 1.9 billion in use in 2014, compared with 682 million iOS/Mac OS installed-base devices. Check out the link Android domination to continue in 2014; iPhone loses ground.
Facebook - 1.2 Billion Users. Facebook's user base is dominated by 25+, but they still have 50+ million user under the age 25. Facebook is a great place to start social media marketing, because your audience will generally lie within one of their age demographics.