摘要：The objectives of this research were: 1) to study the current situation and problems of Thailand secondary education 2) to propose the Scenarios of Thailand Secondary Education within B.E 2570 by using EDFR (Ethnographic Delphi Futures Research) The 1st Phase: the study of current situation and problems of Thailand secondary education. The 2nd Phrase: the four steps of EDFR; Step 1 (1st round of EDFR) expert interviews using a semi-structured interview, summary of possible trends by using NVivo. Step 2 (2nd round of EDFR) trend analysis by using 12 expert questionnaires to find out Medians and Inter Quartile Range. Step 3 (3rd round of EDFR) the expert verification and consensus by using 12 expert questionnaires to find out Medians and Inter Quartile Range. Step 4 writing Scenarios of Thailand Secondary Education within B.E 2570. Research results showed that there were four aspects of current Thailand Secondary Education ; Learning and teaching aspects, Educational personnel aspect, Budget aspect, and Educational administration aspect. The Scenarios of Thailand Secondary Education within B.E 2570 would be 1) 12 possible trends of Learning and teaching aspects 2) 11 possible trends of Educational personnel aspect 3) 6 possible trends of budget aspect and 4) 10 possible trends of Educational administration aspect.In summary, the Scenarios of Thailand Secondary Education within B.E 2570 according to this research could be conclude for the preparation of educational policy in secondary education which accord to educational plan of the office of education council to develop education with high efficiency and internationalize.
