It is amazing what a dedicated teacher can do.
My Science Box - is a fantastic resource for middle school science teachers. Developed by a Californian teacher, these lessons and resources are gold standard, and getting bigger.
With lesson plans, learning programs and guides this is a great help to any teacher who wants to make science that much more interesting.
Aligned to Californian state standards (referenced) it shouldn't be too hard to match them to either Australian or other science curricular. Resources are mainly in word format so that you can adapt them to your classroom requirements.
I also have to applaud the website design - simple, clear and easy to use - many commercial sites should have a look at this.
All resources are creative commons - non commercial so you are authorised to copy and reuse.