The stage from 18-24 months to 7 years Piaget called preoperational, where children can think about things in symbolic terms. They can pretend, verbalize, and understand past and future.

A school counselor remembered participating as one of the little children. Helias student Lauren Verslues led Ronnie Kaye, 5, through a series of exercises about Piaget's Theory of Conservation ...

Jean Piaget's ideas about child development continue to influence pedagogical practices around the world. His pioneering work ...

In 1919, while working at the Alfred Binet Laboratory School in Paris, Piaget "was intrigued by the fact that children of different ages made different kinds of mistakes while solving problems". His ...