Examlex
Why did Virginia,Arkansas,Tennessee,and North Carolina join the Confederacy only after the attack at Fort Sumter?
Lev Vygotsky
A Russian psychologist known for his work on cognitive development, emphasizing the role of social interaction and cultural tools in learning.
Concrete Operational
A stage in Piaget's theory of cognitive development during which children gain the ability to think logically about concrete events.
Counted
The act of determining the total number of items or individuals in a set or group.
Blocks
In cognitive and developmental psychology, refers to mental or physical obstacles that hinder progress or understanding.
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