Oh, I don't think you need a degree in fortune-telling to figure out who I was replying to.

As for 'calibre' and 'caliber', yes of course I know that the latter is American spelling.

I wasn't intending to mix anything up either. Many Chinese teachers are slaves to the text book because the powers-that-be have this crazy notion that it's what the parents want.

Text books should be used as a guide only. They should be used in conjunction with ppt's and other relevant information. Most of the text books that we are expected to use are written for NES, so they are pretty useless by themselves.