Creating collages can be a good way for students to organize their thoughts in a visual manner. In creating their collages they are organizing images that may later become writing prompts for them. I've had students create collages as a way to summarize field trips. Pic Collage is the app that I like for doing that activity. Pic Collage is a free app available for Android and iOS devices. The collage you see above is a very basic use of the app on my Android phone.
After creating a collage students can add interactive elements to it by using Thinglink.
Watch the two videos that I made and embedded below to learn how to use Pic-Collage and ThingLink to create interactive collages.