I love it when they say they want me to teach them full time!

[QED]

But like you said, it's the opposite of retirement.

I subbed for a physics class at my old school yesterday. I hadn't taught the electricity unit for at least 5 years but I remembered how to set up their circuits and reset the capacitors. Guess I still have it!

The week before I subbed for a chemistry class at the same school (I taught chem and physics there). It was gas laws - one of my favorite topics. The kids, like yours, said they understood it now and wanted me for their full time teacher. I think it's just hearing it from a different person - maybe they're more tuned in.

Sounds like we both had successful days (and a little extra $$ to pay the vet bills).