What is teaching?

In the news again today, teachers are not doing their jobs. But what is teaching?

- feeding students who don't have lunch?

- parenting students who don't have parents?

- reminding students to go the bathroom when they forget to go by themselves?

- staying late with students whose parents are not at home or late picking them up?

- looking after students before school instead of planning because they arrive early and there are no monitors?

- counseling MSers having sex because they can't talk to their parents? or they don't have parents?

- advising students on appropriate / inappropriate behavior because they can't talk to their parents? or they don't have parents?