That will depend a lot on the grammatical function of the word in English: This teaching has its origins in Egypt (noun) = Esta enseñanza tiene sus orígenes en Egipto. He is teaching Mathematics (present participle) = Él está enseñando matemáticas. The teaching material (active present participle adjective) = Este material pedagógico. Teaching is a beautiful work (gerund) = Enseñar es una obra hermosa. I hope this helps.

Thanks Patrick. That's what I suspected :)