Here is a great resource to help students understand why ANZAC day is an important day for Australians and New Zealanders.
Gallipoli – The First Day – The full 3D interactive site
It has created by the ABC and it is one of the best resources on this topic that I have ever seen. The game like graphics instantly engage students and the easy to navigate chapters deliver bite size content that allow for frequent breaks to unpack the information presented in the animation.
There are also a bunch of great teaching resource material available to provide you with interesting classroom ideas.