Considering how long I've been subbing, I'm surprised I haven't had this issue before.
I had called ahead a couple weeks prior for this assignment. "Mrs. Jones" at "school A". I've covered Cindy Jones' class several times, so I knew what I was in for. (Cindy Jones' room is pictured above.)
It was a pretty good morning, and I managed to get there fairly early. I went to check in.
"You're at [school B] today for [Rebecca Jones]."
I was told "school A".
A couple things were working in my favor. I was running early. And "school B" starts a half hour later than "school A".
I got to "school B" easily and checked in. It was a bit of mentally changing gears. Cindy Jones teaches English. Rebecca Jones teaches intro to health careers.
I blame the sub caller. She's new. As in, she's had the job for about a month. Mistakes happen.
(I did actually get a chance to chide her for this. She called me for a gig for the next day. I mean, I wasn't going to call her just to give her a hard time about the mixing up of the schools.)