The concrete operational stage is the third of four stages of cognitive development in Piaget's theory. This stage, which follows the Preoperational stage and occurs from the ages of 7 to 12, is characterized by the appropriate use of logic. Important processes during this stage are: Developed first by Jean Piaget, the theory of cognitive development is based on schemas, or schemes of how one perceives the world, in critical periods -- times during which one is particularly susceptible to certain information. ... The Preoperational stage is the second of four stages of cognitive development theorized in Piagets theory. ...
Decentering - where the child takes into account multiple aspects of a problem to solve it.
Reversibility - where the child understands that numbers or objects can be changed, then returned to their original state.
Conservation - understanding that quantity, length or number of items is unrelated to the arrangement or appearance of the object or items.
Serialization - the ability to arrange objects in an order according to size, shape or any other characterstic.
Classification - the ability to name and identify sets of object according to appearance, size or other characteristic, including the idea that one set of objects can include another.
The cognitive structure during the concreteoperationalstage (8-11 years) is logical but depends upon concrete referents.
While the stages of cognitive development identified by Piaget are associated with characteristic age spans, they vary for every individual.
Learning materials and activities should involve the appropriate level of motor or mental operations for a child of given age; avoid asking students to perform tasks that are beyond their currrent cognitive capabilities.