I've compiled an Australian to Canadian dictionary. This is perhaps most helpful for teachers, but can be used by anyone traveling from Canada to Australia. I've only included words and sayings that I have personally heard someone use. This list is by no means extensive, and might be added to at a later time.
Conversation
How are you going? or How're ya going? = How are you doing? For Australians, no we do not over-pronounce the "doing" like Joey from Friends.
“I reckon” as in "I reckon she'll come if we ask."= “I guess/think/figure.”
“in a fortnight” as in "the assignment is due in a fortnight" = bi-weekly or in two weeks time.
“I’m going to the toilet.” = “I’m going to the
washroom/bathroom”
Good afternoon = Goodbye
“I’m heaps excited!” = I’m very excited. Heaps also means
“lots.”
arvo = afternoon
“I stuffed up” = “I screwed up”
“whinging” = complaining
“chuck a sickie” = call in “sick”
“give it a go” = “give it a shot”
“Good on ya” = “way to go”
Teaching
NIT = Prep or just “non-instructional time”
Pupil Free day = PD or PL day
excursion/incursion = field trip/ in school field trip
provocation = hook lesson
texta = marker
rubber or “eraza” = eraser
lead pencil = pencil
coloured pencil = pencil crayons
sticky tape = Scotch tape
recess = recess and snack combined
fruit or brain break = snacktime in class usually only with
fruit
reader = home reading book
reader bag = bag that goes into your backpack that holds your readers
school bag = backpack
Food
Tomato sauce (pronounced tom ah to) = ketchup (sort of)
rock melon = cantaloupe
biscuits = cookies (although some say these are just cookies
that come in packages or tins). Really large homemade cookies are called
cookies by some. Crackers are sometimes also referred to as biscuits.
scones = tea biscuits
chips = thick fries (but not wedges) and also potato chips.
avo = avocado
sultanas = raisins
streaky bacon = bacon
rashers = back bacon
capsicum = red bell pepper
coriander= cilantro
pumpkin = squash
brekkie = breakfast
ice block = freezie
fairy floss = cotton candy
hundreds and thousands = sprinkles
fairy bread = bread with margarine and sprinkles
lollies = all candy
Clothing
beanie = toque
jumper = sweater
wind cheater = wind breaker
bathers = swimsuit
rashies = swim top
sunnies = sun glasses
Things
rubbish = trash/garbage
bin = garbage can
windscreen = windshield
tyre = tire (just spelling)
give way = yield
boot = trunk
number plate = licence plate
tin = can
carpark = parking lot
paddock = pasture/field
bottle-o = liquor store
footy = Australian rules football (more like rugby than soccer, but
definitely not rugby. More like an Australian version of Canadian
hockey, but with possibly more betting. Like the whole country is Don
Cherry and they put their mortgage down as collateral on the next game.
Go Crows...?) 
eskie = cooler
Other/weird
Spit the dummy = Hissy fit/temper tantrum
Fair dinkum = real/true
Pay wave = Tap (debit or credit card)
Macca's = McDonald's
Hungry Jacks = Burger King
bogan = redneck
Chrissie = Christmas
Swag = rolled up bed/tent for one person
Rego = Car registration/insurance
Chook = chicken
