Linda Tallent, a UK-based educational consultant who has worked extensively with schools to develop their outdoor spaces into learning environments, agrees. She believes that by focussing on activities and skill development, it is possible to develop an outdoor learning curriculum on a 'shoe string'. She cites a comment by Will Nixon, who reminds readers that 'Using the real world is the way learning has happened for 99.9% of human existence. Only in the last hundred years have we put it into a little box called a classroom.'. Tallent also refers to evidence from a number of studies that the most effective way of learning is through participation, and calls on educators to make a special effort to create opportunities for children to participate in their learning.