Hang on a second: we've covered possessive pronouns, but not nouns. "Pappas" is not a form we've been taught at this point! (I did guess it right, though.)
: To clarify, I encountered this phrase in the Family skill (I think), but the form "pappas" is not explained until "Ownership", quite a few skills later. I think this is a bug.
Unfortunately, it's not the only subject not mentioned in the notes! For instance,
Boken til mannen. (= The man's book.) You cannot find this sentence or any explanation regarding it in the notes, but you'll find it in the examples. All these aside, maybe you have not completed all five levels of the lesson devoted to possessives, so you have not seen all of the examples, KANSKJE, just KANSKJE!
Yeah, I guess it's fair that the notes won't necessarily cover every aspect. I do like to complete all 5 levels of a skill before moving on, though. I think pronoun usage (e.g. your example with 'til') is pretty much impossible to cover in the notes actually: that seems to be something that is better shown by example.
I do think, though, that the use of the possessive form of a noun was a curve ball. Enough so that I think it may have been a mistake.