Green Initiatives at Stepping Stones Montessori School Following the four pillars of “The Little Green Schoolhouse” proposed by the Green Schools Initiative (www.greenschools.net), Stepping Stones Montessori School has implemented many green and sustainable initiatives since its inception in 2001. We are continually thinking of ways in which we can better our relationship with the earth and our environment and how we can use these opportunities as teachable moments for our children.