I've been studying teaching a lot lately, and one of the things all of the books say is that mastery of the material is required but not sufficient to be a good

I've been studying teaching a lot lately, and one of the things all of the books say is that mastery of the material is required but not sufficient to be a good teacher. The other skills, which basically come down to organization and emotional intelligence seem to be universal. In other words teaching as a skill is domainless but being a good teacher requires subject mastery.