Khan Academy is a comprehensive iOS app that allows ALL students age 6+ to learn almost anything free. The app has a growing library of over 4,200 educational videos and articles. Topics include K-12 math, science, humanities, history, civics and finance. The Khan Academy app provides access to all the videos, articles to read, the ability to track progress, download videos to watch offline and subtitles. Along with the Khan Academy app, we highly suggest users create an online Khan Academy account and engage in the knowledge map.
Click on the link below for full review: