Sidwell Friends Middle School (Washington, DC)

architect: Kieran Timberlake Associates

• the greenest school in the U.S., the first to earn a platinum LEED rating
• if initial cost of going green is high- savings can be even greater:
  the energy bill for primary and secondary schools in the U.S. is $6 billion--and that's per year (more than spent annually on computers and books combined)

Features:

• constructed wetland (first in Washington, DC), treats building waste water on site - part of a closed system that recycles water back to the building and lavatories
• Green roof vegetation holds and filters rainwater; gutters and downspouts direct rainwater to a biology pond, which supports native habitat. Herbs grown by students on the green roof are supplied to the cafeteria
• Building orientation
• passive and mechanically assisted ventilation
• solar chimneys
• solar panels
  5% of the building’s total electrical load is generated on the roof
  
• double-glazed windows
• Window placement, skylights and reflective panels maximize use of natural light so energy for lighting in this building is 10 – 15% of that of a comparable code compliant building
• Recycled, rapidly renewable and locally produced materials such as cork, gypsum, linoleum, bamboo and wheatboard substrate
  Exterior cladding is western red cedar (reclaimed from wine casks)
• Paints, carpets and adhesives were selected for low emission of volatile organic compounds
• carbon dioxide sensors in the classrooms automatically adjust temperature by detecting how many people are inside

Source: http://www.time.com/time/magazine/article/0,9171,1663859,00.html