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.
Então Andrew e seus alunos foram lá, olharam alguns dos trabalhos, entenderam a raiz do equívoco, e produziram uma mensagem de erro direcionada que seria disponibilizada a cada aluno cuja resposta incidisse naquele erro, significando que os que cometeram o mesmo erro poderiam ter feedback personalizado dizendo como corrigir o equívoco mais efetivamente.