21st Century School Fund | 131 followers on LinkedIn. The 21st Century School Fund (21CSF) was founded in 1994 on the premise that communities are responsible for creating healthy, safe, and educationally appropriate learning environments. 21CSF is dedicated to building the public will and capacity to modernize public school facilities so they support high quality education and community revitalization. With the hope that every child in the country learns in an educationally appropriate, healthy, and safe school that serves as a community anchor and is built and maintained in an environmentally and fiscally responsible manner. Learn more about 21CSF at www.21CSF.org.