... A kind of mental structure that the child uses as it interacts with the outside world. A schema contains all the ideas, memories and information about a certain object that a child associates with it. Piaget believed that schemata develop as result of our interaction with the environment. For example a baby develops the schema of shaking a rattle and then applies this schema to shaking a doll. Once used for other situations then it is known as assimilation, however if the baby shakes the doll then throws it, the schema is said to be accommodated. The third process that Piaget uses is a link between assimilation and accommodation called equilibrium. Piaget listed four stages of cognitive development believing that all children progress through the four stages in the same order at roughly the same time. These stages are the sensorimotor stage (0-2 years), pre-operational (2-7 years), concrete operational (7-11 ...

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