Core concepts
Schemas
Assimilation
Accommodation
How they work together
Piaget's four stages
Stage 1: Sensorimotor (birth to ~2 years)
Key achievement: Object permanence
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Stranger anxiety
Stage 2: Preoperational (2-7 years)
Abilities
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Limitations
Stage 3: Concrete Operational (7-11 years)
Key achievements
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Limitation
Stage 4: Formal Operational (12+ years)
Key abilities
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Criticisms of Piaget
Baillargeon's research
Vygotsky's sociocultural theory
Zone of Proximal Development (ZPD)
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Scaffolding
Key difference from Piaget
AP Exam Tips
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Common Mistakes
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