"The old saying, "Teachers will teach the way they have been taught" is very much in evidence in the Thai educational system. Hence, introducing change to educational practices has to start with teachers' learning. When the learning process of teachers and teacher training has been changed, it is assured that the new learning process will be replicated in classrooms. If teacher education is loaded with lecturing, it is very difficult to introduce other kinds of teaching to school learning. If teachers' learning emphasizes memorization or rote learning, it is unlikely that school learning will include high-order thinking. Therefore, every educational reform has to begin with teachers' learning, otherwise classroom learning will not be changed and new learning outcomes will not be achieved."