
Just don’t do it. Not unless you really have to. And by ‘really have to’ I mean:
- You are physically unable to teach (having totally lost your voice, for example)
- You have something genuinely more important to do (a funeral might count)
Otherwise, just Be There. Don’t take a day off. Classes are left at your peril.
Because time away from school is just not worth it.
For a start, you have to leave work for the pupils to do in your absence. This includes printing out detailed lesson plans, photocopying resources, setting out equipment and books, making sure there are enough spare pencils etc. It’s a lot of work and requires much more effort than if you were going to teach the lessons yourself.
And that’s not the end of the matter.
When you return to work, you will regret it. Those fleeting moments of rest and freedom will never compensate for the mess you encounter back in the classroom.
Because the staff that covered for you will have Done It Wrong.
If a colleague has covered for you, they have lost a free period. They will have rushed from their previous lesson at the far end of school, done their best to follow your instructions and then rushed back at the far end of school for their next lesson. With the best will in the world, they will have left the classroom in a mess: they simply didn’t have time to hang around at the end and pick up the pieces.
A supply teacher might have covered your lesson. This could have gone well (if you have a very efficient, disciplinarian supply teacher) or, typically, it will have gone badly.
Supply teachers are, usually, temporary and pupils know this. They are strangers who will be tested and pushed to their limits. Not only does the supply teacher have to decipher your instructions and find all the equipment they need, they have to do this whilst being hounded by over 30 pupils, whose names they do not know.
When I return to work after a short absence I tend to find that my classroom is a mess, equipment is scattered and damaged, there is litter on the floor and in the sinks, books are torn and new graffiti has appeared on the desks. The work I set has not been done, or has been done to such a poor standard it may as well not have been done. I spend my first few days back tidying up and re-covering the topics that were insufficiently covered in my absence.
So don’t. If there is the slightest chance that you can be there in person, don’t even think about taking a day off.
It’s just not worth it.

Perils Of Taking A Day Off