Educational theory and comprehensive knowledge? There should be no "harmony" in the middle. If there is, it should be: comprehensive knowledge of educational theory, your comprehensive knowledge of all aspects.

I suggest you look directly at the educational theory of China Economic Publishing House. These are also good:

Comprehensive knowledge of educational theory

Professional knowledge of education

Examination paper on comprehensive knowledge of educational theory and proposition prediction over the years

Examination paper on the prediction of real questions and propositions of educational professional knowledge over the years