Your older kids are a little bit younger than I am, and I also remember an emphasis on ancient Greek mythology in school back then. It was my favorite subject at the time. Studying ancient mythology is considered to be part of a classical education. Think of it as a lesson in world history.
My own children are homeschooled, and I intended to include subjects such as ancient Greek mythology. Ironically, instead, my children ended up with an education (so far) that is more focused on STEM. But, there are many other homeschool families that provide a more classical education, and their children learn more about ancient mythology.
Have a good night.
I think that the problem I had with the Greek Mythology emphasis in the public schools at that time was that it seemed to plant the seeds that all religions were primitive cartoons and obviously there was never any counterbalancing education in Christianity. I was struck that even though my kids had attended no less than three different public schools in three different states, they had extensive work studying Greek "Gods and Goddesses".
It was all too coincidental in my mind, given the communist nature of our teacher's unions.