english: 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.
non_english: a to sme mohli vidieť zas a znova -- môžete vidieť študentov, ktorým trvalo trochu dlhšie pochopiť jednu alebo druhú vec, ale keď už sa cez to dostanú, idú rýchlo dopredu.