Site for everyone: https://iturnitoff.com

Site for schools: https://iturnitoff.com/school.html

Printables - posters, "tickets", flyers, and a guide to organize your own campaign.

https://www.epa.gov/schools/idle-free-schools-toolkit-healthy-school-environment

Flyers, letters to send home, how to conduct observations, clean bus information, pledge forms, how to run an idle-free campaign.

http://enginesoff.com/2_4_schools.htm

Materials including how to collect data at your school.