A key commonality in Piaget and Vygotsky's theories is :

The key commonality between Piaget's and Vygotsky's theories is the involvement and engagement of children in their learning process.

Key Points

• Piaget emphasized that children are active participants in their learning process.
• He believed that children construct their own understanding of the world through interactions with their environment.
• Learning is seen as an active process where children engage with and explore their surroundings to build cognitive structures.
• Vygotsky also viewed children as active learners but with a greater focus on social interactions.
• He introduced the concept of the "Zone of Proximal Development" (ZPD), where children learn best through guided interactions with more knowledgeable others.
• This approach highlights the importance of involvement and active participation in learning, albeit with social scaffolding.

Hence, we can conclude that a key commonality in Piaget and Vygotsky's theories is the involvement and engagement of children in their own learning.