the teaching.
'the' gives a clue to what part of speech teaching is. If teaching has 'the' before it then teaching is a noun.
I really enjoyed the writing course, the teaching was exactly what I needed.
teaching ( without a 'the') is a verb.
He was teaching a course on creative writing.
The word 'teacher' is a noun. 'Teach' is a verb. I am able to teach, therefore I am a teacher.
The word taught is a verb. It is the past tense of the verb teach.
To teach or preach untruths
I would say that the simplest part of speech/language is the noun. We teach babies by speaking the name of a noun, then pointing to the particular person, place or thing connected to this word.
The part of speech for this particular word is a noun.
part of speech
The part of speech for "answer" is a noun.
what part of speech is beneath
adverb
The part of speech for "explicit" is an adjective.
The part of speech for "lecturer" is a noun.
The part of speech for "rapid" is an adjective.