1) to create more green spaces at schools, have class plants, make use of the school's garden (if it has one)

2) organize projects with students to go out look at the green spaces around the school and take initiative to clean them

3) buying school supplies that are cheap but eco-friendly

Environmental:
It should be possible to bring your own cup from home for using the coffee machines (instead of the plastic or paper ones) as this would minimize pollution on campus.

Social:
Add quiet zones / rooms for relaxation for students to use in between stressful courses or exams

Economic:
Focus on using digital materials to cut printing costs (benefits the environment as well)