Literally years ago, as a trustee around February of 2023, I noticed that the CO2 monitor testing proposal that was ratified had a sneaky line about not beginning the test until after we're back to pre-Covid ventilation levels (i.e. no longer bringing in more fresh air), which might never happen. I was the one to push the issue, but I was told that I shouldn't be the one to put the motion forward because I had just proposed encouraging people to mask, so I was the seconder on that motion to re-write that motion.
The motion was just to try out having CO2 monitors in three schools as a test case. The monitors wouldn't be visible to people, but hidden in the vents, remotely monitored by board staff, and that's a line they wouldn't budge on. If they were visible, then teachers could use them to decide if windows should be opened for a bit to air out the room or the HEPA filter actually plugged in! Maybe they were worried about it causing a panic. Who knows! Before I left, which was before that motion was going to be argued about and voted on, I pleaded with the chair to try to add in a line that the reporting of the monitors must report per classroom or at least a range, not just give an average per school. She didn't seem to think it was important.
It's so clearly important. The school average could show 700 ppm, which is pretty good, and miss that some rooms are at 500, and others at 2,000. As a teacher with my own monitor, I was in a classroom that regularly hit over 2,000 - every day - while other rooms were much better. My room also barely got any heat in the winter. It was an ongoing problem for decades that never really got fully addressed.