A new national effort asks K-12 schools to voluntarily — and anonymously — report their confirmed and suspected coronavirus cases, along with the safety strategies they're using. … Right now it shows an average of 230 cases per 100,000 students, and 490 per 100,000 staff members, in the first two weeks of September. The responses come from public, private and charter schools in 47 states, serving roughly 200,000 students both in person and online, as of Tuesday, Sept. 22.