Final answer:
The educational practice aligned with Lev Vygotsky's approach to cognitive development is collaborative group learning, reflecting his sociocultural theory which emphasizes the importance of social interaction and cultural context in learning.
Step-by-step explanation:
The educational practice that reflects Lev Vygotsky's approach to cognitive development is c. Collaborative group learning. This is because Vygotsky's sociocultural theory emphasizes the role of social interaction and culture in the development of higher mental functions. Therefore, educational practices which involve collaboration and interaction among students are in line with Vygotsky's views.
The sociocultural theory posits that children's learning is fundamentally shaped by their cultural context and social environment. Through collaborative group learning, students engage with their peers and educators, sharing knowledge, ideas, and cultural viewpoints that can facilitate the zone of proximal development, a key concept in Vygotsky's theory regarding the distance between a student's ability to perform a task under adult guidance or with peer collaboration and the student's ability solving the problem independently.
Furthermore, when applying Vygotsky's sociocultural perspective, we can recognize the value of peer-to-peer interaction, scaffolding from more knowledgeable others, and the mediated nature of learning, making collaborative group learning an educational practice that aligns well with his theoretical framework.