Imposes extra costs on education system.  Many schools are simply not set up for year-round use. In particular, most schools are not air-conditioned and often use older, poorly-ventilated buildings and classrooms. In many parts of the world, opening schools during summer would either involve expensive retrofitting and renovation, or sweltering hot classrooms with distracted children. There would also be increased overheads and costs associated with year-round catering, security, heating and administration. [1]  [1] Richmond, Emily. “Year Round School Could Face Calendar Shift”, Las Vegas Sun, 16th March 2010.