Common Craft. Recently, they published a comprehensive free guide to creating animated GIFs as explanations.
In How to Create ExplainerGIFs you will learn how to create animated GIFs using software that you probably have already. Through the guide you'll learn how to publish and share your explanatory GIFs. If you need images to use in your GIFs, How to Create ExplainerGIFs has a section devoted to finding images appropriate for crafting explanations.
Applications for Education
Having students create an animated GIF to explain a concept could be a good way to get them to think about how the individual parts of a concept come together to form one cohesive process.
The examples section of How to Create ExplainerGIFs are a good source of ideas for using animated GIFs in school. In the examples you will see animated GIFs used to bring graphs to life, a GIF used to explain how a sewing machine works, and a GIF to illustrate a soccer rule.