I've heard about this skill, but I haven't found any common ground that could help me. I am sure there are many interesting and valuable articles on the subject, but for me, the highest level of education is a tutor from 私人補習. I tried their system and realized that it is really very reasonable and logically meaningful. I haven't had anything like it since I graduated from university. That doesn't mean that my children can be exempted from learning, so I've turned to these tutors on a particular assignment. I am confident of a positive outcome.