I've done a bit of research and I'm finding articles from Florida that say it's below 4th grade.
and the so-called "Don't Say Gay" bill, which bans instruction involving gender identity and sexual orientation before fourth grade
That's from an article that whines about banning LGBT books in school libraries.
Of course, they don't mention that school boards in the state have banned classics like Huck Finn, To Kill A Mocking Bird and many more because liberals don't want them in school libraries.