Really great, interesting study & thanks for linking. A few really interesting observations here: "Student masking compliance was reported to exceed 92% throughout the course of the study. Older children were reported to be equally compliant with masking as younger children. High levels of compliance, small cohort sizes (maximum of 20 students), and limited contact between cohorts likely helped mitigate in-school SARS-CoV-2 transmission and could be responsible for the low levels of transmission detected in schools." I am legitimately astounded by that percentage, and would have thought it to be much lower. Especially considering my own observations of rural Wisconsin as a 'lawless wasteland of social distancing compliance', kudos to these districts for having sound policies and adhering to them. I'm further surprised by the "older children equally as compliant as younger" data point, as again I'd assume that there would be challenges with keeping teenagers compliant. Interesting finding! "The actual mask-wearing rate might have been different because only approximately one half of teachers participated in the study. Teachers with lower masking compliance in their cohort might have been less likely to complete the survey, which limits the reliability of this measure." I think this is indicative of a larger societal problem in that some of the data skews because of 'response bias'. Early in the pandemic, I know there were questions about the high percentages of people who reported mask compliance in NYC while still getting infected, and one theory was that some portion of the respondents flat out lied when put on the spot. There's obviously no way to know what the resulting skew is, but I appreciate that the study acknowledged this potential issue. I think the conclusion is that logical compliance measures for mask wearing, social distancing, and smaller cohorts seem safe at this point. I know that teachers I've talked to personally have suggested that the former become difficult as the cohorts become full classes, as many indicated that there simply isn't enough room in most classrooms to properly distance students and staff. Do the teachers here have a similar opinion on that?