But when you let students work at their own pace -- we see it over and over again -- you see students who took a little bit extra time on one concept or the other, but once they get through that concept, they just race ahead.
i això ho veiem una vegada i una altra i una altra, veus alumnes que triguen una mica més de temps amb un concepte o un altre, però un cop entenen el concepte es posen al dia.