So today looked rather the same as yesterday around here. Both days I started to feel better by the evening, today more so. We again got most of the things done that I wanted, and I got a nap in the middle of the day.
On days like this the best thing to do is to prioritise what is most important to be done, and let other things slide until you are better.
Learning is a daily journey done with or without structure.
https://www.cantrip.org/gatto.html
"The six lesson school teacher", a great article, covering what school actually teaches your child.