Read Made to Stick: Why some Ideas Survive and Others Die, by Heath brother that what makes an Idea a SUCCESS is SUCCESs. It stands for:
If any idea that is to be communicated has few or all above qualities, it would STICK in the minds of audience, others would die. The rest of the book just explains each quality. Plus, the whole book is filled with useful resources for teachers, as one of the author has been a very enthusiastic teacher.