I always felt math material would lend itself well to a directed acyclic graph of topics/information. It's something I tend to do informally - look at an equati

I always felt math material would lend itself well to a directed acyclic graph of topics/information. It's something I tend to do informally - look at an equation I need to understand, then go backwards to the pre-requisites until things are explained in terms of things I'm already familiar with.