Dan Meyer said:

most software for individualized instruction fails to connect learners in the kinds of productive debates Brendan describes. And that’s by design. Individualization is the watchword. Don’t let yourself become burdened by your classmates! But in many cases your peers aren’t burdensome. They’re essential. And the software fails to distinguish one case from the other.

via http://blog.mrmeyer.com/2014/tools-for-socialized-instruction-not-individualized-instruction/comment-page-1/#comment-1968224