Some American students recently completed the school year and others are preparing to end soon. But as students in some parts of the country already deal with hot classrooms, the summer break cannot come soon enough. Some new research has found that student performance drops when temperatures rise. The study mainly blames a lack of air-conditioning in many U.S. schools for causing learning problems. The private, non-profit organization National Bureau of Economic Research released the working paper, Heat and Learning. Its writers are from Harvard, the University of California at Los Angeles, the University of Georgia and The College Board. The researchers examined test results of 10 million U.S. students attending high school from 2001 to 2014. The paper says the students scored lower during hot school years than cool ones.
