This perception of sequencing fits the views of some progressive educators and open education. Macrosequencing follows principles of child development expounded by persons like Arnold Gesell, Frances L. Ilg, and Jean Piaget. Macrosequencing, said Orlosky and Smith, is the organization of knowledge and the formulation of instruction to coincide with the dif- ferent stages of the individuals development. For a long time teachers have arranged the knowledge of instruction roughly in accordance with the development of the child. Ex- amining the existing program of studies of almost any school proves that it corresponds roughly to the child's development.