The Captain Planet Foundation (CPF) provides grants to schools, primarily those with annual operating budgets of less than $3 million, that are intended to catalyze environmental activities in schools and communities and inspire youth to participate in community service through environmental stewardship. CPF will fund innovative projects that do not precisely match the grant guidelines but otherwise promote the foundation’s mission.

September 30th- typically for spring and summer projects
January 31st- typically for fall and winter projects

See more at: http://captainplanetfoundation.org/apply-for-grants/