While working on the iBookHack project I've gotten to meet some amazing educators. One of these is Tara Maynard. Tara saw a cool HTML5 math practice widget in an iBook and she wondered if it would be possible to put something like it in her own books. I showed her how she might reproduce the basic idea of the widget in Keynote and she went on to create this great template. She has shared it so you can use it as a starting point for your own practice widget. If you need a little help you can check out my video below.
The problem is shown, if there are accessibility concerns a button is included that will read the problem aloud to the student. Each problem can provide a hint to help aid students in independent practice and finally the solution is provided so students can get instant feedback to see if they were correct. Since it is made in Keynote the problem, hints, or solution can include pictures or videos as well. Overall it is a great interactive element to include in an iBook and doesn't take a lot of technical skills to implement.
The core idea of this widget centers on creating a "Links Only" presentation in Keynote. If you need a little more information on this you should check out another video I made, which is also included below.