I worked for years in a private preschool & daycare and in the last year or so the company had ipads for each teacher with an app which was used to send photos to parents, assessments, messages about items needed at school, incident reports, etc. Honestly, imo most of the preschools that are franchises have owners who aren’t willing to spend more money than is absolutely necessary on tech for teacher surveillance, so while it exists it’s not as bad as it could be if the school owners were willing to spend more. My school did for instance have a policy against live streaming video for parents, even though it was often requested, especially for parents new to the infant room, but our explanation was that it was too easy to hack and we couldn’t guarantee the privacy of all the babies so even if you wanted it and agreed to it for your child, if one parent didn’t agree then we couldn’t do it, so that was good (though it totally ignored the willingness and privacy of the teachers). We did, however, have cameras (that didn’t record) in classrooms which could be watched by management in the office, and a lot of that was for liability and checking where classes were without having to run around the entire building and all the playgrounds to find out, plus creepers liked to lurk where they could see kids playing across the parking lot and such. So. Lots of Very Not Ideal things but in the private pre-K world the owners of franchise schools are such cheapskates that it could be worse if only they were willing to spend the money, ime.