Where can I find software to download for students in New South Wales,
Australia, to learn and understand the year 7 - 10 (NSW education
stages 4 and 5) and/or year 11 - 12 (stage 6 or HSC) information
technology syllabi? 

The software must be interactive and teach a part
of the syllabus, for example, how a CD-ROM drive works, or a piece of
software which can be downloaded or bought on how the internet or a
network works.