I don’t know. Regulations vary from state to state.
I’m in NY and we were required to teach certain subjects but have the freedom to pick the curriculum or plan of instruction. The district didn’t approve it or disapprove it, only let us know if it met state standards.
It’s a kind of fine line differentiating between that and approval and disapproval, but they couldn’t tell us not to use it, but rather where it needed to be supplemented.
CA homeschoolers would be the ones to best answer that question, so I’m pinging out the list.
we homeschoolers in California have NO regulations... no curricula approval... nada... no state standards to meet... we are treated as private schools... so we submit an R4 Affidavit once a year to document our intention to run our homeschool/private school... that is it...