Overall, COVID-19 rates were higher among the younger students (grades 7-9) than older (grades 10-12). Rates peaked in the 9th grade (20 cases in one class, 13 in two others) and 7th grade (14 cases in one class). 7/25 teacher cases were exposed to these four classes: four taught all of them, two taught three, one taught two. The 7-9 graders had classes in a separate wing than the 10-12 graders but they all shared the schoolyard and public spaces.