I'm 31 yrs old & have a Bachelor in Pure Mathematics from a university in my country & I worked as a math. teacher for 3 years up till now in middle/upper school.

I need to live in Australia for some time for the purpose of being an officially certified Mathematics teacher so what type of study I should pick up?

1) Postgraduate certificate in Education (Math.& Science Education)
OR
2)Postgraduate diploma in Education (Math.& Science Education)
OR
3)Master Of Education (Math.& Science Education)

MY MAIN aim is saving a big amount of time/effort/money if i started studying from scratch so I wanna know where I'm currently standing regarding the B.SC which I hold from my country's university and then starting from that point upwards till I, hopefully, achieve my dreams (Be a certified qualified Mathematics teacher)

P.S. I studied @ my university different subjects in Pure & Applied Math. but I'm more interested in Pure Math. as Applied math. is not taught in schools anyway (at least in my country)

MANY THANKS in advance for your kind feedback and responses