You don't have to know everything, but Know something about everything...That's Education.

He did well when we were in school and he studied applied chemistry.

He is a committed and dedicated chemistry teacher.
I am certain that he knows, understands and loves chemistry, especially teaching it.

Mr. John is God fearing, intelligent, diligent, coolheaded, creative, goal getter, well behaved and committed personality with focus of serving and making impacts in the life of anyone he comes across.

I have known him for the past five years as a member of my local church. I therefore have no reservations whatsoever to vouch for him.