This is simply an idea I incorporate once in a great while to add something memorable to an otherwise less than exciting topic. As the name implies, doing everything backwards. Walking into the room backwards, or writing on a white board backwards (I taught myself to write in reverse years ago. It can be read in a mirror perfectly) or at least the words in reverse order. Young people rise to the challenge of struggling through a backwards presentation. The key here is that it is memorable, and hopefully they will recall the lesson taught as well. Have fun!