Just because I know People from Outside of the Organization are all Probably bringing Attention to my Answers I will try to add some Good Stuff here.
Sourcing Materials for Teachers (Cost Effective Props and Tools)
Outside Contribution Pathways, or Ways to Contribute to the Classroom without ever being there and Earn Money doing it
Also, Swimming Lessons maybe or something, there are other kinds of Classrooms besides like Pre-K and Government School, and Unschooling. There could also be a Homeschool Organizer Course. There could be all kinds of New School Things, like a Montessori Course, there could be Children of Military Parents, or even like Children's Civics (what is it when Everyone goes to the Fire Station?), etc.
We could go so far as Ancient Mysteries, the Constellations and Astrology, Homer and somehow just call it like Mythology or something