The American School Hygiene Association was a group of people who wanted to make sure that students in schools were healthy and clean. They thought that if kids were healthy and clean, they would learn better and be happier. The group had doctors, teachers, and other important people in it.
One of the things the American School Hygiene Association did was teach kids how to wash their hands properly. They explained that you should use soap and water and rub your hands together for at least 20 seconds to make sure that all the germs are gone. They also wanted schools to have clean bathrooms so that kids could use them safely.
Another thing the American School Hygiene Association did was make sure that schools had clean air and water. They wanted to make sure that the air inside the school was clean so that kids wouldn't get sick from breathing in bad air. They also wanted to make sure that the water in the school was clean so that kids wouldn't get sick from drinking it.
Overall, the American School Hygiene Association wanted to make sure that students in schools were healthy and clean so that they could learn better and be happy. They did this by teaching kids how to wash their hands, making sure that schools had clean air and water, and other important things.