Final answer:
Jean Piaget proposed a theory of cognitive development in which children develop schemata to help them understand the world. They adjust their schemata through assimilation and accommodation.
Step-by-step explanation:
Jean Piaget was a psychologist who studied child development and how their minds develop. He proposed a theory of cognitive development that unfolds in four stages: sensorimotor, preoperational, concrete operational, and formal operational. According to Piaget, children develop schemata to help them understand the world.
Schemata are mental models or concepts that help us categorize and interpret information. When children learn new information, they adjust their schemata through assimilation and accommodation. Assimilation is when they take in information that is comparable to what they already know, and accommodation is when they change their schemata based on new information.