www.Meograph.com is an awesome way for students/teachers to easily create, share, and play back stories in context of Where and When.
They call it four-dimensional storytelling … pretty cool.
Can include maps, narration, video, images, text etc
I made this quick Meograph about Vichy France in three minutes. : http://www.meograph.com/stevesingapore/18291/vichy-france
The website has a really easy video tutorial. Every feature works on iPad as well as online except the recording audio narration element, so slight compromise.