in the big scheme of things, its not high. but just consider that was day 2 of school.Honestly not a high number at all.
The emergency board meeting at my wife's school last night was because of a couple kids coming back positive. They all tested negative last week before school started, or they wouldn't be allowed on campus. Everyone in class with them has to quarantine for 3 days if vaccinated, 10 if not. 40 kids per class, 6 classes per day, each covid positive kid knocks 240 kids plus 6 teachers out of class. Currently they have about 700 kids off campus, for 1 single school. I predict remote learning commences the day after the recall election.
440 for a whole district in a super sounds like a lack of testing. I'll bet that's only presumed positives with symptoms, and it would be in the thousands if asymptomatic kids and those exposed were also at home.