The focus of this article is on ways to help students develop mental models. As a strategy for remembering, having a model is useful - it's a lot easier to remember things when they're placed into a structure. But must remember this (this was the whole of my Master's Thesis) the model is not the reality. It's not a 'lens'. It's a aid for remembering, just in the same way the memory palace is a aid. The real skill here is being able to navigate from one model to another (a bit like depicted in the diagram), seeing the subject first from one view, then from another, keeping in mind all along that no view is the 'right' view. And this is why building things - with your hands, with software, with words - is an excellent way to learn how to learn.