Our own DC only attended one primary school, then 2 (KS3&4, sixth form), 3 (Yr7, yrs 8-11, sixth form) and one (yr7 - yr13) secondary schools, respectively.
I know that DH attended at least 2 primary schools; formally, I attended 5 (Army brat), with a brief period of HE for some reason I have long since forgotten, if I ever actually understood, which included an unofficial stint at the primary school my then supply teacher mum worked at for a while.