About ten minutes before class I started distrusting my notes.

I had copies made and a basic plan in mind, but then the nagging feeling that I’d done all that before set in. I checked and rechecked my notes, but I couldn’t find anything resembling certainty. I decided that whatever the truth, I could probably wing it.

About halfway to class I realized that, yes, I had done the lesson before. Luckily I was teaching a lower level class which meant they moved rather slowly through the material. However, I knew I’d need more material for my sixth period class, which was the same grade but a higher level.

Then I realized I hadn’t taught a lesson for my fifth period class which meant I couldn’t yet teach the lesson I’d planned to teach.

Somehow, I got through all the classes. It taught me, though, to take better notes, or at least to update them when plans change.