Teaching English Language for foreigners

I am a licensed teacher in the Philippines. I took up a Bachelor's degree in Elementary Education. I had a teaching experience for two years, I taught English Language to Japanese, Korean, Taiwanese, and to other Asian students. And a private tutor before. I have also worked as a call center agent in any BPO industry, I was a customer service representative, sales agent representative, outbound telemarketer or Lead Generation agent. I worked as an agent for more than four years. So I guess I was exposed to talking to other people, especially international people because my customers in the call center were Americans.