[ZeroGravitas]

Only 6 months later? I'd pegged it around 3-5 years.

Your Kumon math suggestion is exactly what Khan academy are doing as their first big usage of this stuff. See the links I posted elsewhere for more info from them.

I think the big difference is that Khan Academy is building their whole approach around the analytics, rather than vice versa. There's plenty of "free" info you can collect from web or online courses or question banks, but I've not seen any real concept for feeding that back into the course construction.

For example, at one "learning analytics" thing I attended it was discovered that the really big indicator of whether a student was going to pass or fail was whether they did well on exams. This fact though was buried so deep behind a super simple traffic light dashboard that no user would have ever been able to figure it out and do something useful with that info, like for example change the course to have more and earlier testing, which is easier than ever with modern technology.

For whatever reason, just testing student's knowledge isn't considered quite as exciting as trying to predict their success by applying dizzyingly complex math to the trail they leave on the web.