I was a reader at an early age.
In first grade, while everyone else was taking turns reading a page from Dick and Jane, I read ahead and finished the book. Unfortunately, the teacher would call on me to read a page right when I was much further on and, not having paid attention to what the last person had read, I couldn't find what i should read. Which made the teacher think I couldn't read at all.
When we finally completed that book (and maybe another Dick and Jane book) the teacher told us we could take home ANY book in her glass front bookcase to read at home. So I choose Black Beauty! She tried to talk me out of it, but I persisted (it had a horse on the cover) and managed to read it. It took a few months and I kept asking my parents what this or that word was, but I read it.
I'm stubborn like that.
In second grade, I kept checking the Wizard of Oz series out from the public library. It was a small room staffed by volunteers. One of them refused to let me check any more OZ copies out of the library -- because they were Fourth grade books and I was depriving some fourth grader of being able to read those books.
I was furious.
So I became a children's librarian for over 40 years and never, ever told a child they couldn't take out certain books.