I found this website really helpful as it explained the Anzac legend in more detail. It had information on what the legend is, how it was created and why it is important.
http://www.skwirk.com.au/p-c_s-14_u-42_t-46_c-136/the-anzac-legend/nsw/history/australia-and-world-war-i/gallipoli-and-the-anzacs

This website explains what Anzac day is, what it stands for and why it is special to Australians. It also has information on the Anzac Day services.
http://www.awm.gov.au/commemoration/anzac/anzac_tradition.asp