Yea, YOU ARE THE INSTRUCTOR is correct. I took my CFI with the FTW FSDO back in 1999 with Jim Minter who was very straight-forward and very fair. But after one of our full stops in Denton, he asked if I mind if he flew a pattern, and of course I said "sure". He took off and made some "common errors" and I was thinking, 'heck, is he doing this on purpose to see if I'll critique him or does he normally fly that way and am I better off keeping my mouth shut while he gives me a break?' Don't assume anything he does isn't part of the evaluation; if in doubt ask (or assume it's indeed part of the evaluation and he wants to be critiqued). I guess it would have been better to clarify with him what he expected, but I picked up on his errors and corrected him (diplomatically) and ultimately passed.