DS and DD have different half terms. DS goes to a special school.
In DS' half term we often use the week to work intensively and support his development and or travel to intensive therapy, perhaps with overnight stays.
Also, when state schools are not on half term, there are opportunities for visiting zoos, theme parks and museums without the overwhelming crowds.
I cannot do any of this if dd does not accompany, and I can't take her to any of the above in HER half term because DS won't be able to accompany me.
I have seen the stats of relationship between absences and achievement but tbh dd is unlikely to fall behind given the amount of hot-housing she has had just by being around for most of ds' therapy and tutoring. However I also know that the reasons for schools wanting no absences has not a lot to do with the individual child and everything to do with their ofsted records etc.
So, how do I make this work?