Sutori
Target Audience: Mostly for teachers, but students could use it too
Link: www.sutori.com/education
Sutori allows you to create and view timeline-like presentations and study aides for any topic you can think of that bring the information to life. Students are able comment on items in the presentation in order to ask questions and deepen knowledge. They are able participate in this collaboration in real time.
Check out this help center page to help you get started.