Several strategies can be used, in an effort to create air cleanliness awareness in schools.
The first strategy that can be used to create air cleanliness awareness in schools would be that of having that particular subject (on air cleanliness) included in the curriculums. Of course, for this to happen, you have to lobby with the people who are in charge of education at the topmost level, and that is not always easy.
The second strategy that can be used to create air cleanliness awareness in schools would be that of giving special lectures on the same in the schools. This is the easiest model to use, for all you need to do is get authorizations for giving such lectures from the school managers. But there is only so much impact you can make through occasional lectures: though they are definitely better than nothing.
The third strategy that can be used to create air cleanliness awareness in schools would be that of engaging the students through the Internet. Most schools nowadays have computer labs, and in any event, most students have smart-phones through which they access the Internet. So you can, for instance, use www.gmail.com mail, through the Gmail page, to send email newsletters containing information designed to help the students gain awareness about air cleanliness.