For science, we like Building Foundations of Scientific Understanding by Nebel. The k-2 book is affordable and thorough.

My 4 year-old loves Life of Fred and begs for it at night. We're just finishing Cats now and he can easily handle the math. Why not give it a shot? If you buy from the author it's $16 including shipping and has a 30 day money back guarantee if you don't like it. I admit, I don't really get the humor, but my son really loves it and as you go higher in the series, there is a surprising amount of content. I'm glad we are doing it.

Michael Clay Thompson has a great curriculum for language arts. It would probably be a nice fit for her.

Another vote for Beast Academy and skipping Saxon

Building Foundations of Scientific Understanding

NOVA on PBS, You Tube, or Netflix are also big hits here.

The Max Axiom Super Scientist series is great to get from your local library. My son loves them.