I can't get the quote to work sorry.

I thought you were in the US. It is not uncommon for kids to go through those first levels slower then speed up once the hit about level 6 until level 12 or so (at least that is what i was told). It is also quite a reasonable target to go up four levels by december. The kids who are racing ahead will probably slow soon (if not they will just not be given any instruction from my experience).

Do they have composite classes where you are?