I spent all of last week in an 8th grade science class. We got through a chapter's worth of material. On Tuesday and Wednesday, my job was to cover the lecture and notes portion.
The thing that got me through that week was the other 8th grade science teachers. They were there for me. Especially the head of the department. They made sure I had the materials I needed. They gave me places to send misbehaving students. And as I was walking in totally cold, they made sure that I knew what lessons needed to be done.
For the lecture, the head of the department gave me a USB drive with the lecture slideshow on it.
The students got a packet of work. They finished filling in the notes in the packet from material taught to them via the slideshow.
On Tuesday for first period, I got the electronics (the projector, the computer) all working. We got through the first few slides just fine. And then I found that information that the students had in their packets was not on the slides.
Oops. I probably should have, I don't know, looked over the material before trying to present it.
Yeah, I felt like an idiot. In my defense, I thought that everything the students would need to know would be in the materials I was given.
Then I got a call from the head of the department. She had given me the wrong slideshow. She was sending the correct one right over.
I used the correct slideshow for the next group. What a difference! Everything that was missing from the previous presentation was there. And it didn't take all that much time to fix what period one missed when I met with them next.