I went in today to find there was a teacher off and some juggling being done to arrange cover - so I ended up teaching 'my' class from 9-10.40 unexpectedly. Then I was teaching them (planned) from break until 2.30 anyway - so I've taught practically the entire day today. And doing the same tomorrow (planned this time though). I'm exhausted (as usual!) but also 'high' as it's been a really good day.