The main reason is that parents don't bother teaching their kids where to put their poop, claims The Independent.
Most primary school teachers see a large increase in the number of "accidents" that happen in school. I wonder if UK schools expect children to stay in school all day for kindergarten as they do here. I also wonder if they are starting to drill, drill, drill those children as we do.
I'm telling you, things are different today. Even though Emperor would only be in fifth grade were he in school, the schools have changed into little testing factories since he left in kindergarten. (It has always been a teach-to-the-test environment to an extent, but it's more extreme now.) Could children who have only been regularly using the restroom for a year or two be more prone to have accidents under stress or in a new situation?
I think so. It's also obvious to me that with a sharp increase in autism worldwide, that there would also be a sharp increase in the number of children who haven't quite mastered this skill by school age. Woodjie is severely autistic and has had occasional accidents at school.
Commenters (God bless 'em!) posit that certain ethnic groups are more prone to be "little soilers" and wonder why children should even be allowed to stay home (when the state can raise them better, I guess).