If you're looking for a great resource to learn about Australia, here's an awesome one that you can download for FREE from the Australian embassy website. "Tell Me About Australia" is available in a 48 page pdf file. This resource for school children K-8, includes facts on geography, unique wildlife & the environment, history, aboriginal culture & natural wonders, government, education & sports.
Use the Australian Federation Resource Bundle to take a different approach to teaching Federation: from the assumption that it never happened! Encourage students to think about how their lives would differ, for better or worse.