[tuukkah]

Yes, I think it will be somewhat random how many cases each child needs to be taught before they generalize. One thing I forgot to mention is that for polysyllabic words, they use a learning aid here: in the beginning, the syllable boundaries are marked with dashes in all text and in the second year, only in longer words. I don't know if it works in Spanish too, something like this: "A-yer ce-na-mos cons-ter-na-dos." Again, I think it's unnecessary for some children but helps others to keep learning while gaining more experience with the syllables.