Final answer:
Lev Vygotsky's sociocultural theory best describes the teacher's disposition for instruction in this learning environment.
Step-by-step explanation:
The theorist that best describes the teacher's disposition for instruction in this learning environment is Lev Vygotsky.
Vygotsky's sociocultural theory emphasizes the importance of social interaction and collaboration in learning. In this type of classroom, where students are working collaboratively on assignments and projects, the teacher's role is to facilitate and support their learning. The teacher acts as a guide, roaming the room and providing assistance to individuals and groups of students, which aligns with Vygotsky's emphasis on the social nature of learning.
Vygotsky also emphasized the importance of the Zone of Proximal Development (ZPD), which refers to the gap between what a student can do independently and what they can do with guidance and support. In this information-intensive classroom, the teacher's disposition for instruction involves identifying and scaffolding students' learning within their ZPD, helping them to develop new skills and knowledge.