For me, I think I'd love to teach creative writing and grammar, but I'd love to teach ged level topics.
When I worked in mental health, I did that a lot and it was really good for me to teach and help people who never had someone to work with them. I created a creative writing group at the mental health facility I worked at. They'd share their work during an open mic or even at talent shows.
I'd transcribe their writing when they couldn't spell and help them put their sentences together. I helped them write to their case workers and advocate for their needs.
I think I'd love to be able to do that for everyone. If full communism happens, that's what I would love to do every day for the rest of my life.
What about the rest of you? Is there something you'd be able to talk about enough as a teacher? It doesn't have to be something like literal education. I know people around here really know theory, or genres of music or games, or history. What would you want to share with the world?
Soil science.
By the end of high school most people have heard of sand and clay, and know that you can make glass with one and pots with the other. They're lucky if they have been taught by that point what sedimentary rock and organic matter are. Maybe they'll be able to tell you that the city of Troy was destroyed and rebuilt several times, turning into a bigger mound in the process, but we are really quite ignorant of the blanket of fragments that we rely on, directly or indirectly, for almost everything. I was doing a unit project in a science class when I realized I knew nothing about "dirt" and how it worked.
The class would involve smashing rocks, using ice to deform and break stuff, screening soil, doing sedimentation and other soil tests, river simulations, looking at stuff under a microscope, composting, and growing plants.