I'm sure you've seen reports on the American national spelling bee. Spaniards often don't quite get the idea, since a spelling bee would make little sense in Spanish. Spanish spelling is phonetically regular, with I think three exceptions: the B and V are sometimes confused, as are the "soft" G and J, and since the H is silent it's sometimes used or left off incorrectly at the beginning of a word. In dialects that don't differentiate between the Y and the LL, those are also often confused. For some really bad spelling, check this out.
Something similar they do around here in school is mental arithmetic; another one is dictation.