As it says in the slide:
Quote:
EPUB Widgets 1.0
‣ Video and Audio
‣ Popup
‣ Image gallery
‣ Multiple choice or true/false quiz
‣ Text resizer
‣ Scrolling sidebar
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That pretty much sums up the functionality of this format. From what I've seen those EPUBs usually contain Javascript files for interactivity, as Toxaris mentioned, those would probably work best on the iPad.
This page:
http://www.infogridpacific.com/blog/...the-world.html
Is a great example of an Educational EPUB.