Hire the best teacher for the job
I worked in Thailand more than a decade. Sadly, many schools in Thailand prefer native speakers over Asians, even to teach math and other technical subjects. I am a math teacher with several years of experience teaching high school math. I remember I had applied for a high school math teaching position in one of the schools in Thailand . As expected, I was not even called for the interview, perhaps holding a wrong passport. Later, one of my American friend with the acceptable skin color was hired for that position. At the time of hiring, he had a couple of years experience teaching grade 4 math, but had never ever taught high school. However, I had the opportunity to help him with questions from his students. I think schools in Thailand should strive to hire the best person for the job, regardless of their nationality
John
