I taught M1-1, to M1-7 all boys 12 years old. Smallest class 47 students largest classes M1-5, M1-6, M1-7 was 68 students. 900 students I would say maybe 90 students passed. However (every student passed.) One kid M1-7 weakest class, one student scored the highest grade in the school. I had never met him once. Thai Senators son. Amazing. Two years was enough. I also taught Univ. Senior English majors. I had to use a 4th grade text book. they said it was difficult. Later on I taught in Danang, VN. Kids 6-8 years old in a language school 10 kids per class we finished the book in 2 weeks. I have a masters in English and Educ. I have taught many years. The reason I taught in Thailand was because I had a farm and kids there. I wish I had known about VN sooner. The kids were eager and the pay was double what I got in Thailand.