Lots of literature (mostly classic up through the mid-20th century), history (ancient, medieval, early modern, American), mathematics, science, grammar, and a small handful of other things.

We learned to spell, then write cursive, then we studied vocabulary, then we just wrote.

My mom was an English major and taught me almost everything I know about formal writing. I sailed through my first year of college from the momentum she gave me in that regard.

We also pretty consistently had some sort of exposure to music. I took two years of piano lessons, but I spent much longer signing Gregorian Chant with our church choir.