The legacy of Jean Piaget to the world of early childhood education is that he fundamentally altered the view of how a child learns. And a teacher, he believed, was more than a transmitter of knowledge. He/she was also an essential observer and guide to helping children build their own knowledge.

As a university graduate, Swiss-born Piaget got a routine job in Paris standardizing Binet-Simon IQ tests, where the emphasis was on children getting the right answers. Piaget observed that many children of the same ages gave the same kinds of incorrect answers. What could be learned from this?

Piaget interviewed many hundreds of children and concluded that children who are allowed to make mistakes often go on to discover their errors and correct them, or find new solutions. In this process, children build their own way of learning. From children's errors, teachers can obtain insights into the child's view of the world and can tell where guidance is needed. They can provide appropriate materials, ask encouraging questions, and allow the child to construct his own knowledge.

Piaget's continued interactions with young children became part of his life-long research. He explored children's countless "why" questions, such as, "Why is the sun round?" or "Why is grass green?", and concluded that they do not think like adults. Their thought processes have their own distinct order and special logic. Children are not "empty vessels to be filled with knowledge" (as traditional pedagogical theory had it). They are "active builders of knowledge - little scientists who construct their own theories of the world."

(Adapted from: https://www.scholastic.com/teachers/articles/teaching-content)

According to the text, what important role is fulfilled by the errors of students in Piaget’s view?