Sophie is doing correspondence school with the NSW Department of Education. I'm sure it's different to being in a classroom, but it's still just ordinary old Kindergarten.
This year, in the literacy program, apart from learning to read, she has learnt about contractions and apostrophes; contents and indices; verbs and prepositions; exclamation marks and ellipsis.
When I was at school, I didn't learn about verbs until my year nine French teacher, exasperated by our ignorance, spent two weeks teaching us about English verbs. And I didn't know what a preposition was until I studied Greek at college.
I suspect Sophie is not actually expected to remember these terms yet. Even so, I am learning plenty!.
Note for readers outside of NSW: Kindergarten is the first year of school proper. In many places, this is called year one or first class.