Storytelling apps are great to use in order to teach an audience about something specific in a short amount of time. It can be used for biology- to show mitosis or evolution, it can be used for history- to tell a brief story from the past, it can also be used for foreign language- to work on linguistic skills while being creative. This storytelling app is called 30hands. Projects can be created on the mobile app and published using the website. 30hands also does have some in app purchases which are drawbacks. But otherwise 30hands can be great for in class use no matter what the topic happens to be about.
A tutorial of the app is available: