Solution guides
Over the years, I have worked on solution guides for various puzzles which can be downloaded and used by your speedcubing club, even if you are trying to teach people yourself, it is usually easier to do it with the visual aid of a solution guide, having the arrows showing which layers need turning helps to prevent mistakes.
I would always recommend making sure you know your algorithms really well so that if you are directing someone to solve a cube for the first time you can spot their mistake right away and fix it before the whole cube gets scrambled again, it helps to avoid the very offputting case where a learner gets to the very last step but does the last algorithm wrong and has to almost start again.