The first out-of-the-ordinary occurrence was when one of the home ec teachers tried to talk to me.
Teacher: When are you going home?
Me: I don't know. <Isn't it kind of early to be asking me that?>
Teacher: Aren't you going home over winter break?
Me: <Oh. That.> No.
Teacher: You are?
Me: <D'oh, I did it again. I keep forgetting that whole negative reversal thing.> No, I'm not.
Teacher: Are you going to make a Christmas cake?
Me: We don't have that tradition in America.
Teacher: Are you busy?
Me: ...? <Talk about a non sequitur. Where did that come from?>
Teacher: <tries again, probably thinking I didn't understand what she said> Are you busy on the 24th?
Me: I don't know if you'd call it busy, but I'm making a present for a friend.
Teacher: What are you making?
Me: Clothes and such.
Me: No. Sewing.
Teacher: ...Crocheting? <adds hand gestures to be sure I know what she's talking about>
Me: <Either she didn't hear me, she didn't understand me, or she just plain didn't believe me.> ...No.
Teacher: I'm helping a bunch of students make Christmas cakes on the 24th.
Me: ... <That's nice.>
Teacher: But if you're busy, never mind.
Me: ... <Oh. Now I get it. This entire conversation was to ask me if I wanted to make a Christmas cake with your students. That's really nice of you, but it would have saved my poor brain a lot of effort if you would have said so.>
Then later in the afternoon, the vice principal came over to my desk and told me that I would be asked in January if I wanted to renew my contract for another year, so I should think about it.