From London to Philadelphia, schools are employing clean energy to teach what they practice--and practice what they preach.

No running in the halls--except at this London-area school. 

Simon Langton Grammar School for Boys not only encourages foot traffic in the halls, but relies on it. That's because tiles underfoot collect kinetic energy, powering lights and outlets throughout the school and connecting students with technology. 

Even in Philadelphia, where public education has seen massive budget cuts, schools are powering their buildings while exposing students to clean energy. The Philadelphia Solar Schools Initiative is fundraising for its plans to install and teach solar power in 20 schools across the city.

The be-green, teach-green movement is catching on. Yesterday, Green Woods Charter School held its ribbon cutting on site in Roxborough. The multi-million dollar project will give hundreds of students access to ponds, organic gardens and streams for academic study and hands-on learning. 

The buildings may be sustainable, but consistent funding for energy and STEM education remains uncertain. In 2011, Kensington Creative and Performing Arts High School became the first LEED-certified public high school in the United States. While the building is an impressive feat in engineering, the school's PSSA math scores have fallen below average in recent years as cuts to teachers and classrooms continue.