I thought it was fitting to look for Anzac Day resources and I found this wonderful site with loads of resources. Some resources could also be used when studying History. Some of the activities include information to create a timeline which can be achieved with an online programme. There are computer activities for creating a wreath of poppies, scavenger hunts, films, videos and maps to name a few. This site has early childhood, primary and secondary resources. There are so many different resources it would be hard to know which one to use considering Anzac Day is only for the one day and not a lot of time would be allocated.
This article has eight sites for timelines http://www.educatorstechnology.com/2012/08/8-excellent-free-timeline-creation.html