The teaching profession is encouraged to design and implement teacher codes of conduct, based on the highest ethical and professional standards, and to be oriented around the goal of teaching all students effectively and equally.

UNESCO: OFFICE IN APIA

He signed up for English classes at a community college, where a teacher encouraged him to attend the University of California, Berkeley.

NPR: Farmworker to Surgeon: Immigrant Lives Dream

But he talks warmly about the inspiring teachers - in particular a science teacher, Mr Brookes, who first encouraged him in his comedy by letting him use a reel-to-reel recorder to rehearse funny voices.

BBC: Lenny Henry's long road to a PhD

He was encouraged by his "fantastic teacher" Mansel James, who put him on the track of adventure.

BBC: World explorer Hempleman-Adams: 'I've been lucky'