Updated roof, and air, as well as increase the venting the roof, which will allow better airflow and is understandable. Student's health it accordingly.
Improve and open up the roof, including adding roof vents. This will allow better air circulation. And as a way to get good results. Good health of the students as well.
Improvement of roof high and open up the vents at the roof. The well ventilated, and is a very effective method, the health of the students well according to the.