5 Day Mini-Australia Unit (3-5) This interdisciplinary unit about Australia includes modifications for children with special needs. It is intended for 4th grade but can be modified.
http://www.halcyon.com/marcs/miniunit.html
Australian Aborigines (4) In this lesson, students are introduced to the Australian Aborigines, their culture and customs.
http://www.adprima.com/aborigines.htm
Australia Lesson Plans and Activities (4+) Over 15 lesson plans and activities are available here. Lessons include Australian geography, animals, people and the Outback.
http://members.aol.com/MrDonnHistory/K12east.html#OZ
Australia: The Land Down Under (5-6) This unit on Australia for older students covers 18 days of instruction. Each lesson is detailed and state standards for Michigan are included.
http://www.coe.wayne.edu/~mpettap/lesson/aussie.htm
PBS Kakadu Classroom Activities (6+) This is a mini-science unit for older students that teaches about Kakadu, and its animals and culture.
http://www.pbs.org/edens/kakadu/classroom.html