The fundamental principle of Education for All (EFA) is that all children should have the opportunity to learn. The fundamental principle of Inclusive Education (IE) is that all children should have the opportunity to learn?together. Diversity is a characteristic that all children and youth have in common?both within each individual child and across individual children. There is strength in diversity, and all children have strengths. It is the fundamental responsibility of all those who teach and of all those who support teachers to build on children's strength, to believe in all children's capacity to learn, and to uphold their right to learn. Children are our future. As Ms. Gabriela Arrieta and Ms. Audrey Cheynut put it in their opening address at the UN Special Session on Children (May 2002): "We are not the sources of problems. We are the resources that are needed to solve them. We are not expenses, we are investments."