My interpretation is that Xander chose the space partly because there was room for spectators and partly because Buffy would have plenty of equipment to use. I base that on the fact that this wouldn't be the first time they've used heavy construction materials in place of weapons. And since bringing a bag of weapons would defeat the purpose of the lesson
Why? Slayers don't usually fight with teeth and claws, you know. Not to mention that the Ccoobies regarding the stupid lesson as more important than increasing their chances of survival is incredibly silly.
I don't think the Scoobies are in complete control of the outcome, and I don't think it was meant to be portrayed that way at all. I think they had an Ubervamp coming to their house, a captured warrior that they needed to rescue, and lots of frightened girls who assumed they were about to die and needed to watch someone fight and win. It was desperate, and it was the best they could do in order to try to rectify as many aspects of the situation as possible.
Except we have seen dozen of times that letting Buffy fight with no plan and no weapons is not the best the Scoobies can do, not by a long shot.
But I don't think any of them felt the least bit in control. I think they were being stoic.
And we also know that Willow and Xander are not stoic - at least not when it comes to watching calmly while Buffy seems to be dying. They rush to help Buffy even when that seems suicidal - see for instance Xander against Spike in The harsh Light of the Day or Willow against Faith in This Year's Girl. They either thought Buffy was in complete control (despite their eyes telling them this was not the case) or they were wildly OOC.
Well, when I watch a show, I expect to see character growth. The growth needs to be consistent with who they are as a character, but I never expect somebody to stay exactly the same. Buffy's got a lot more confidence in this scene than she ever had before.
Only if you call being a kamikaze "having confidence", IMO. To me that was the exact opposite of growth. We have always seen that Buffy uses improvisation as a last resort tool - not as the one and only approach to a fight. In Teacher's Pet, I doubt they thought that the she-mantis was that strong but they still took the time to record some bat-noises which came in handy in the fight. In her first meeting with a vampire after being briefed about their nature, Willow is already throwing holy water at them rather than blindly rush and hope for the best. Suddenly in S7 Buffy somehow needs to win by sheer brute force because "that's the lesson"?!? Okay, then in S9 she will probably start flying by waving her arms because the plot will need that to happen
T
The Unspoken
Buffy can already fly in the comics... ;D