With this free education app, knowledge is literally at your fingertips. The Khan Academy iPad app features more than 3,200 videos from the nonprofit organization's extensive library. The Khan Academy aims to provide free world-class education for anyone, anywhere, and this app does just that. The materials and resources available for viewing and download cover topics ranging from math to biology, chemistry, finance, history and the humanities, among others. Use the app to create entire playlists to watch offline at your own pace; follow along with subtitles; track your progress; and view your achievements. The app caters to anyone who wants to learn, from children to adults and from students to teachers. Download the Khan Academy app from the iTunes App Store. These sites are not affiliated with AFCEA or SIGNAL Magazine, and we are not responsible for the content or quality of the products offered. When visiting new websites, please use proper Internet security procedures.