Here are some important and useful links to explore: http://www.staysmartonline.gov.au/ has interactive games made for different age groups, as well as advice for all types of Internet activities.
Australian site http://www.cybersmart.gov.au/ Lots of good information
For primary students try http://www.cyberquoll.com.au/index.html
A numbers of other good sites are:
Susan MacLean, who came and spoke to students last year is at www.cybersafesolutions.com.au