“She, nearly alone among the parents,”
That was my experience taking on leftist indoctrination. One thing I did was read my kids assigned books and work. The indoctrination isn’t limited to a month. It was year round and that was in the 1990’s. Now those kids are the parents and so the schools don’t try to hide it.
Opting out is a fantasy that parents trying to justify sending their kids to most schools are using. There is no such thing as a good public school (and most private schools too).
If you are “nearly alone among parents” when dealing with a school administration over any contentious issue, then your children are in the wrong school.
The National Association of Independent Schools enforces diversity, equity, and inclusion indoctrination [DEI; antiracism] as a requirement for accreditation:
Why Private Schools Have Gone Woke
Leaked video, documents reveal LGBT indoctrination in private schools across America
Memphis Christian School Under Attack For Affirming Christian Values
Democrat attorneys general seek to force Catholic schools to hire homosexual teachers
[Eighteen Democrat attorneys general joined an amicus brief in a Federal Court of Appeals against a North Carolina Catholic high school that fired a substitute teacher in a “gay marriage.”]
Parents Sue Elite Schools for ‘Indoctrinating’ Their Kids With Anti-Racist Policies [California]