Meograph is a free, easy multimedia storytelling tool. Students can quickly combine videos, audio, pictures, text, maps, timelines, and links to create what the developers call "four-dimensional storytelling." No registration is required and an education version is available. You have to play around with it to get the concept before introducing it to students.
Meograph helps easily create, watch, and share interactive stories. Our first product combines maps, timeline, links, and multimedia to tell stories in context of where and when.