Since 1995, the Boston Schoolyard Initiative (BSI) has been transforming Boston's schoolyards from barren asphalt lots into dynamic centers for recreation, learning and community life. The BSI model continues to evolve. New outdoor classroom designs, included in every schoolyard renovation, bring teaching outdoors and nature to the schoolyard. Green practices are now often a part of schoolyard design and construction. And BSI teaching resources and professional development help teachers revitalize instruction and motivate students to learn.