I was browsing through an American study guide and it recommended remembering the order of arithmetic operations through this mnemonic:
PEMDAS (Please Excuse My Dear Aunt Sally) –
Parentheses, Exponents, Multiplication, Division, Addition, Subtraction.
Locally, I learnt and teach kids this:
Brackets, Order, Division, Multiplication, Addition, Subtraction.
According to this wiki page, this is the UK way.
Another interesting one is
SOHCAHTOA – for the three trigonometric functions.
Locally, we teach students to remember “Toa Cah Soh” which in a local dialect actually means Big Feet Aunty.