Knewton is an adaptive learning service. Knewton no longer offers GMAT prep courses. Per the website:
“Unfortunately, we stopped offering our Knewton GMAT Prep course in early 2014. Since 2008, we’ve helped tons of students prepare for the GMAT and gain acceptance into some of the world’s most competitive business programs. We’re humbled by the number of current and future business professionals who have entrusted their future to us, and we certainly wouldn’t be where we are without them.