I seem to recall the reduction to 3 feet from six feet was a sop to the unions. Biden was trying to split the baby.
You refuse to answer the question about your claim that the CDC director switched her opinion on teachers not needing to be vaccinated for schools to reopen because it's false. So, you try to dance around it.
To once again dance around that question, you make another claim that the the CDC guidance which reduced desk spacing was a concession to teachers' unions. Despite the fact that it was the
opposite of what their unions wanted. Teachers' unions opposed that change, just like they opposed CDC guidance that teachers did
not need to be vaccinated for schools to re-open. The new Secretary of Education, that Biden appointed, successfully overcame resistance and protests from the teachers' unions in Connecticut to reopen their schools as Education Commissioner. Reopening schools for in person learning is a top priority for Biden and they're actively working to overcome reluctance from teachers' unions to get schools open and provide the necessary resources to make it happen.
The current guidance from CDC for school reopening recognizes local situations and has flexibility.
"Schools should determine, in collaboration with state and local health officials to the extent possible,
whether and how to implement each of these considerations while adjusting to meet the unique needs and circumstances of the local community.
Implementation should be guided by what is feasible, practical, acceptable, and tailored to the needs of each community. It is also critically important to develop strategies that can be revised and adapted depending on the level of viral transmission in the school and throughout the community, as this may change rapidly. Strategies should be implemented in close coordination with state, local, or tribal public health authorities, recognizing the differences between school districts, including urban, suburban, and rural districts."
Your claims are so far off base that they're not even in the ballpark.