Knewton

Knewton is an Adaptive Learning company that has developed a platform to personalize educational content. The company was founded in 2008 by Jose Ferreira, a former executive at Kaplan, Inc. The Knewton platform allows schools, publishers, and developers to provide adaptive learning for any student. https://en.wikipedia.org/wiki/Knewton

Oct'2015 Michael Feldstein is dubious.