For navigation purposes we have deliberately chosen to use Google Slides to organise and share learning. A feature of Slides is the ability to generate a URL that publishes the slide deck to the web and displays in full screen on the iPad rather than embedding the slide deck.
The published URL is added to the site via a button. When a slide deck is updated in the Drive it will automatically update on the learning site. See screencast below with instructions for sharing the slide deck on the learning site.
Links to the slide decks on the site will typically be updated at the beginning of each term, including archiving links to past learning.