This is also very closely following the pandemic. I'd imagine that massively pollutes their data. I didn't see a comparison to comparable districts that didn't

This is also very closely following the pandemic. I'd imagine that massively pollutes their data. I didn't see a comparison to comparable districts that didn't implement a ban. Just from anecdata of my own kids, enforcement is nearly impossible. Phones are banned citywide as of this year but it sounds like they are still being used pretty openly.