answer: Kate tells #Person1# about her new chemistry teacher Mr. Black and his teaching style that Kate isn't allowed to do anything without watching.
documents: #Person1#: What class did you have this afternoon, Kate?
  #Person2#: A chemistry class. We've got a new chemistry teacher this term.
  #Person1#: Who is it?
  #Person2#: James Black. He told us to call Jim, not to call him Mr. Black.
  #Person1#: Oh, James Black. I know him. He's a little thin man who smiles a lot.
  #Person2#: Yes, but many of us are afraid of him.
  #Person1#: Really? But I hear he's a very good teacher.
  #Person2#: Yes, he is. His classes are always lively and interesting. And we all watch and listen to him very carefully in his class.
  #Person1#: It's important to watch carefully when you're studying chemistry, I think.
  #Person2#: Jim often says that too, So we are never allowed to do anything without watching.