I created a PowerPoint presentation for each topic--one per day--and added voice over instructions. So, the kids still hear my voice, still get a lesson, and everyone is happy. (I also had to prove to my principal that the kids wouldn't be losing out because I was gone.)
The basic slide show remains the same from year to year, but I have to re-do the voice overs and timings every year. I tend to make comments during the show that relate directly to the students in those classes. Some years I add jokes--this year, I didn't. I also make sure to remind them to behave and not act like complete fools.
That, brings me to the other item I use to prepare for a substitute. I have them sign a Sub Contract. In it, I state the consequences for bad behavior and the rewards for good behavior. This year, some of my
Don't know yet, if I get to torture or reward them....I'll keep you posted.