english: So Andrew and his students went in, looked at some of those assignments, understood the root cause of the misconception, and then they produced a targeted error message that would be provided to every student whose answer fell into that bucket, which means that students who made that same mistake would now get personalized feedback telling them how to fix their misconception much more effectively.
non_english: Andrew en zijn studenten doken erin, keken naar de taken, begrepen de oorzaak van de misvatting en maakten een gerichte foutboodschap voor elke student die in dat mandje terechtkwam. Studenten die dezelfde fout maakten, kregen zo gepersonaliseerde feedback om hun misvatting  efficiënter te kunnen bijsturen.