First of all, you should make it clear that the doctor of education is not easy to take the exam-the master of education, the leader of the education administrative department, etc. Many people are vying for a limited degree, so this is not as simple as a master's degree and it is not easy to review.

Secondly, if you want to take the exam, you'd better make an agreement with the unit and appoint a trainer. I don't know how your school is, and whether you are allowed any treatment. You can consult the personnel department of your school.

Third, as far as employment is concerned, there is a certain gap between pre-school education, teacher education, educational technology and other relatively new professional colleges, but it will not help if you want to return to your original post in the original unit.

Fourthly, it is easy to study the teaching theory of a course with your original major, and you can study the teaching problems of this subject with your original subject.