Originally Posted by Wren
So reading level is not the same as interest level.

Yep. I say DD has a 4th-grade reading level, because she decodes and understands at that level. But her interest level is more often 2nd-3rd grade. (I think that's mostly because 4th (and many lower) grade books tend to have concepts and characters that just aren't relevant to her in her little 3-year-old world.)