Is it correct to assume that both you and your non-failing friends put in considerable work outside the lectures? Or, depending on the exact subject, at least s

Is it correct to assume that both you and your non-failing friends put in considerable work outside the lectures? Or, depending on the exact subject, at least skim Wikipedia? If so, that is certainly an even better way to learn than by lectures, but unfortunately will not be possible by the fourth or fifth year in university.