Step 1: Have you asked your teacher?
Step 2: I will list all the practicals that school's can do.
Step 3: Ask past students. This is important because school's in Australia cannot afford fancy equipment, chances are the practical work will be a repeat or similar to that of last years.
Step 4: Ask your teacher to let you borrow the lab. (Don't explode it...yet)
Step 5: Accuracy, validity, relability.
Step 6: Learn all you can about each equipment used and the physics principle of the practical (Once you find out.)
Step 7: Med for lifeboats
Also, haven't I helped you somewhere in the past before? Your name rings a bell...|
IMPORTANT: HSC EXAMS CAN ASK YOU ABOUT THE WAY YOU DID YOUR PRACTICAL!