The Unsolved and Unexplained Mysteries Presentation is one of my students' favorite assignments during the school year. I have used Google Slides, but students could use any presentation application.
Students must research a mystery by gathering facts and theories about the mystery and presenting the most plausible theory with facts to support it. Some examples to choose from are included in the presentation. However, I have other suggestions that I give, as well. I've found that many times students like to research local mysteries.
This assignment also encourages the use of EasyBib to create a slide for works cited. The use of EasyBib should be taught as part of the lesson.