How private and parochial schools largely kept students in school full-time this COVID-filled year

The vast majority of private and parochial schools in the Lehigh Valley opened their doors for five days of in-person instruction a week this school year. Accordingly, their waitlists have swelled with families eager for more in-person learning, often coming from public schools whose ability to have students in school full-time has been hamstringed by social distancing guidelines. How did they manage?
Source: Morningcall