People would be alarmed by the "heating" and "air conditioning systems" in Texas schools! If any exist, they're mounted wall units in the classrooms, and those are usually heaters. Air conditioning is very expensive, so to cut building costs...

Administrative offices may have air conditioning.

Leaving a hall or classroom door ajar to circulate air is the only way to get fresh air into the stifling classroom heat. Remember the time of year this happened? That's when Texas is becoming brutally HOT.

People looked for somebody to blame. How about beginning with school construction? I doubt if anywhere in the professional work sector would tolerate the lack of air conditioning for the work environment like students and teachers endure in Texas school classrooms.

Texas isn't the only state that does this either.