puzzles to inspirations???

My first is in tea but not in leaf

My second is in teapot and also in teeth

My third is in caddy but not in cosy

My fourth is in cup but not in rosy

My fifth is in herbal and also in health

My sixth is in peppermint and always in wealth

My last is in drink, so what can I be?

I’m there in a classroom, do you listen to me?

The solution here is Teacher,who carry many knowledge.