My question is if your child could go through grade school quickly, should you let them? And provide what is needed to do so? And support them doing so?

Once my DD5 started school this year I relized that at the rate she goes through the material she will out grow her school in a couple of years if she continues her drive for learning, it seems like she going faster instead of slowing down. My DH and I purchased some learning material a couple of years ago that have material for each grade up to 4th (it was a sale at Costco) when looking at what her school uses it the same type of thing so it's right on track with what their teaching at the correct grade level, she found them in my office and is now going though each grade. She stated "as soon as I'm done I'll be in 5th grade"

Even if I did nothing she still would go through the material like a force of nature, cause that just the way she is. Do I just let her continue with what she's doing, get a tutor? She'll ask me a question now and then but she mostly does it herself.

What are your thoughts on this subject?
Thanks