Below are some links you can search to help you define your CAS project.
SciStarter- a place to participate in citizen science
YouthMovements.org is a collaborative program that connects, supports and maps youth-led and youth-serving projects. In partnership with organizations - across the youth sector, YouthMovements.org supports youth-led development projects by mapping the projects of multiple networks in one place and by increasing contact between diverse networks of engaged young people. Read our Declaration of Interdependence. This site provides young people with information and opportunities to get involved in tackling the world’s greatest challenges at the local, national and international level. Organizations benefit from increased recognition, increased understanding of the sector, new ideas to be more effective and exposure to new young people.
Clean Up the World engages an estimated 35 million volunteers in 130 countries each year, making it one of the largest community based environmental campaigns in the world. They inspire and empower community groups, schools, businesses, and local governments to join as Members and carry out community-based activities that address local environmental issues. By facilitating local action, Clean Up the World brings about global environmental change.