Comment by lusus_naturae

I think that's something missing from adulthood--study or learning groups. There's a chance that in every group you'll have someone good at something, so you can teach eachother. Personally, I am unsure how to approach someone with such a request, it feels like such an imposition to them. Unless someone is professionally offering services, I'd feel awkward asking. Though in my experience, people who sign up to teach often shouldn't.