Book Creator
Book Creator lets students create multimedia ebooks. For other ideas, please see Richard Byrne's post.
Lyndsey Stuttard has a whole playlist of YouTube videos on Book Creator at https://www.youtube.com/watch?v=-kN8gaQ5WDE&list=PLmQ5z3DGWICto5IQRdNtwnzHOLUfhnpmJ or start with her Introduction, below.
Add Ebook to your Google Sites
Basics of Book Creator - Introduction - Lyndsey Stuttard