Achieving excellent air circulation in your classroom is imperative to keep pupils focused and alert. Poor air quality, whether stuffy or smelly, has proved to be detrimental to the attention span of young people.
Many people are not aware that to achieve excellent airflow through a classroom, more than one window must be open. Rooms with opening windows on different walls are most effective when trying to get a through-flow of air. In old Victorian classrooms with high windows, one high window should be opened, along with another lower window at the opposite end of the wall. In modern classrooms with just one layer of opening windows, try opening one at the front and one at the back.