What is Socratic's mission?
A staff member can probably answer your question in greater detail. I found this on their About page.
"We want to create a free, open resource for the world that makes learning easier.
We believe every student who can access the Internet should feel that way. Amazing teachers don't just deliver information, they constantly empathize with the student's perspective, anticipating the stumbles and breakthroughs. But learning happens well beyond the classroom. We want to give every student instant access to great, contextual teaching right when they need it."