How can I be selected for the post of a mathematics teacher?

Hi friends,

I am a mathematics teacher completed my post graduation and B.Ed from an Indian university. But, when I try to apply for the jobs abroad, I can see that they prefer licenced/ certified teachers especially in the international curriculums. We may not speak like native english speakers, but we can teach math/ science as good as them. How can I be considered for these posts? Or how can I get a chance to teach in international curriculums as a begginner? 

Thanks