Learning Paths: compile a database where you specify a goal, possibly a fairly vague one, and users contribute the bits of knowledge that would be useful to acc

Learning Paths: compile a database where you specify a goal, possibly a fairly vague one, and users contribute the bits of knowledge that would be useful to accomplish it, all the way down to the very basics. So if the goal were "Write a 3D graphics engine", users would collaboratively add items going all the way back to, say, basic geometry or trig. I was thinking that llvm sounds pretty interesting, but I don't know anything much about compilers or interpreters, so not only do I not know how I could use llvm, but I'm not clear on what it could do. Another 'learning path' could lay out what knowledge and/or experience I'd need to build to get to the point of being able to understand and use llvm for an interesting project. This could also be useful for teachers. A kid interested in video games could see the things they ought to learn and master, and would see how they build on each other. That would help answer the "when am I ever going to use this" question.