This is a study unit on Australia including geography topics, aboriginal culture, Australian animals and "Waltzing Matilda" (among other things!) It's designed to cover about a month of study, but could be expanded or shortened to fit your needs. Essential curriculum materials cost $7. Can be expanded with various resources and materials (including a didgerigoo) that cost up to $50.
This online program provides adaptive reading passages on history and science.
This resource provides virtual manipulatives and online lessons for math learning.
An inexpensive, rule-based spelling program.
Another site with videos for elements in the Periodic Table.
This site is an interactive atlas, timeline and encyclopedia of world history.
A no-frills, free online typing course.