It used to be that you had to go to a classroom, and there would be some diligent teacher -- some genius teacher in there -- but that person was only in there at certain times and you had to go then, and then was not most times.
Nekad ste morali odlaziti u učionicu gdje bi bio vrijedan učitelj -- neki učitelj genijalac -- ali ta osoba je ondje samo u određeno doba pa ste morali odlaziti baš tada a to nije bilo često.