All tools were created to solve at least one problem. Explaining what that problem is, and how the tool is useful for solving it, goes a long way towards making

All tools were created to solve at least one problem. Explaining what that problem is, and how the tool is useful for solving it, goes a long way towards making it easy to figure out the abstract template of tool application. Going a step further and explicitly explaining why the tool works and when it doesn't is the marrow of an actual education that can be used out of context.