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,
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.