Jean Piaget's concrete operational stage spans the years from 7 to 11 and marks a major turning point in cognitive development. What are the major characteristics of the concrete operational stage? How might cultural practices affect children's mastery of Piagetian tasks, especially those associated with schooling? Which aspects of Piaget's description of the concrete operational child do you accept as true? Which do you doubt? Why? Explain in 125 words or more