Tablet focused design ideas?

Hi all,
The Oppia app was initially designed primarily for phone-sized devices, and although it still works fine on a tablet, the layout is not particularly optimised for the extra screen space that is available on tablet devices.

We would welcome any suggestions/ideas for tablet-optimised designs - even if they are just drawn an paper/whiteboard and take a photo!

Cheers,
Alex

One thought I had for tablets was to have the app view in landscape mode only, then the course menu could appear on the left (so you could see the whole course structure and the activities), and the course activity content on the right.
Anyway, just an idea and feedback welcome!

App works fine on tablets but dimensions are app specific so need to add tablet specific relative dimensions so whole the screen can be used for the application.