Students in Boston had their first day of classes today, and things got off to a rather sweltering start, with many Boston public schools not having air conditioning. That has raised the hackles of at least one teacher in the district. Michael Maguire teaches Latin at Boston Latin Academy in Dorchester. McGuire is posing a challenge to Mayor Marty Walsh to turn off the air conditioning in administrative offices throughout the city until all of the city’s schools have air conditioning installed as well. Maguire spoke with WGBH All Things Considered anchor Barbara Howard about his proposal.