Check out this Thinglink example created about the Boston Massacre. It was easily created by logging in, uploading an image, and then clicking on the image to add the hotlinks. The Thinglink was saved and added to the gallery for public viewing.
Thinglink for Education, and then create student accounts. Students accounts can be created with or without a student email address, so it is a great tool for both elementary and secondary classrooms.
Thinglink is fun, engaging, simple, and it is just one of those tools that can enhance any classroom.