Fifth period is right after lunch. The bell rang, and I opened the door. I had put up their assignment on the board, and I was ready for them all to enter.
Three minutes into the passing period, and no students were arriving. Um...
A student poked her head in.
"We meet over in..."
Oh, right! I did see that.
Every morning when I check in, along with the room key I'm given a teacher schedule. It has all the teacher's periods listed along with the room number the teacher is in. Normally, the room number for each period is the same.
I did notice that 5th period was in a different room. Then I got busy with the day and periods one through four.
It completely slipped my mind that I was supposed to be in a different room for period 5. My oops.
I quickly grabbed all my stuff and ran over there (luckily it was only three doors away). We were in the room and ready to go before the tardy bell.
I really should pay closer attention to these things. (It would have helped if the teacher had mentioned it in the lesson plan. However, she explained the oversight when I saw her after school that day. So, mostly my fault.)