I guess the majority of ESL teachers in Thailand regard the Thailand Teacher's Council requirement to either complete a nine month weekend study Graduate Diploma of Teaching, or pass a set of exams (which all the evidence suggests are poorly written, highly subjective and for which the pass rate is pitifully low) as an unwelcome impost.
Nevertheless, for those of us who are committed to Thailand for the mid to long-term for whatever reason, this is a reality we have to deal with. At least two institutions in Bangkok offer a weekend study program leading to a Graduate Diploma of Teaching that fulfils the TCT requirements: Ramkamhaeng and St Theresa's. But nothing has been available for those many of us teaching upcountry.
Recently I inquired whether Ramkamhaeng would be willing to offer their weekend progam in Khon Kaen if there were sufficient numbers. Their response was yes, they will do it if we can find 14 people willing to commit. The price is 66,000 baht which is not chicken feed for those on a teacher's salary, but it is a lot less than St Theresa's program. They will accept payment in two instalments: the first two weeks before the course started (likely early June if numbers are there) and the second payment mid-term. We would probably host the program here at Mahathai.
I have at least three and possibly four teachers at Mahathai Boys School who want to do it. I wonder if there are other teachers out there in the KK province who would be seriously interested. If there are, I invite you to get in touch with me by email email@example.com. Please only do so if you are willing to make the commitment to enrol. General information about the program is available on the Ramkamhaeng website.