Piaget's stages of cognitive development (video) | Khan Academy
https://www.khanacademy.org/science/health-and-medicine/executive-systems-of-the-brain/cognition-lesson/v/piagets-stages-of-cognitive-development
WEBPiaget's cognitive development theory outlines four stages: sensorimotor, preoperational, concrete operational, and formal operational. Each stage, occurring at different ages, represents unique ways children understand and interact with the world.
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