PECHAKUCHA is the name of a presentation format based on simplicity, efficiency, and efficacy.
Most of the time, we as spectators usually get bored because of the presentation document, the speaker way of talking or even the presentation is too long to keep attention. With PECHAKUCHA that is not possible to happen because the speaker has to limit itself to a closed format: 20 images (slides) and 20 seconds per each.
If you show your students this idea and put into practice with them, they will able to perform a presentation in a truly professional way. It also helps to empower public speaking and language skills.