so...on that lettered system, no one has told me what happens when the kids outgrows it. Before we left the last school, Butter told me they finally got their reading levels. She was at "Z" at the end of last year (2nd) and this year the teacher told her she was at "a higher level of Z". WTH does THAT even mean?

I get excited when the library lets me know my books are ready for pickup...