All students play different instruments and at varying proficiencies. A teacher's job is to develop skills and make these instruments come to life as a coherent whole - to make music. This is very important, good teaching is about humour. It's about being self-deprecating and not taking yourself too seriously. It's often about making innocuous jokes, mostly at your own expense, so that the ice breaks and students learn in a more relaxed atmosphere where you, like them, are human with your own share of faults and shortcomings.
Good teaching is about caring, nurturing and developing minds and talents.
It's about devoting time, often invisible, to every student. It's also about the thankless hours of grading, designing or redesigning courses and preparing materials to still further enhance instruction. Good teaching is supported by strong and visionary leadership, and very tangible institutional support-resources, personnel, and funds. Good teaching is about mentoring between senior and junior faculty,teamwork, and being recognized and promoted by one's peers. Effective teaching should also be rewarded and poor teaching needs to be remedied through training and development programmes.