I have commands in Mathematics and Physics. I was Nuclear Scientist in India. I usually teach to gain 4 steps of learning:-

1) Knowledge
2) Understanding
3) Application
4) Imagination

These goals are achieved one by one. Also I believe that best teacher teaches students by understanding their mental level as every student cannot be at same level. I have some experience of teaching students from year 6 to A level. I prefere in-person teaching as it provides a chance for more interaction with children.