On my desk here at school is a big calender tablet. I use it quite often to make little diagrams and drawings to explain a concept or answer a question my students ask. The other day one asked about how model rockets work, and i made a quick sketch- complete with motor, ejection wad and parachute. I do the same thing with all my little diagrams, make a quick draft, once over and hope it is clear enough to explain what needs explaining. But then the drawing remains on my desk for a time. I go back to it during the downtime, adding detail and making improvement. Before long, it is something i feel some bit of appreciation or pride in. But it usually has outlasted any real usefulness. The student has moved on, the diagram is yesterday's sip in the desert, and he or she is not in that need anymore. I appreciate my little expression, though, and it remains, catching snippets of my attention until March makes the page completely obsolete.
I love being able to explain things. I like being able to improve something that makes some sense into something that makes more and looks nice. I reckon this is pretty much the motto and ethos of the teacher in some respects. Especially we silly English teachers.