Plato, as a lot of people know created the Platonic Academy, which focused on teaching many subjects, but didn't any pre-Socratic philosophers think of making an academy/school for teaching subjects such as philosophy or math etc.
Because after all, a philosopher needs to share his knowledge with people (well in my opinion).
My question is: Were any philosophers in the pre-Socratic era interested in creating academies/schools. If not, why weren't they interested?