According to National Curriculum Framework, 2005, which among the following is an activity based on ‘constructivist’ classroom ?

Correct option is B

The answer is (b) Teacher observes the group activity and facilitates the students for problem solving.
Constructivist classrooms are characterized by student-centered learning, where students actively construct their own knowledge through hands-on experiences and collaborative learning. Option (b) aligns with this constructivist approach as the teacher facilitates the students' problem-solving process, allowing them to explore, discuss, and construct their own understanding of the concepts.
Option (a), teacher-led problem-solving, is more traditional and does not provide the same level of active engagement for students. Option (c), rote memorization of formulas, is not in line with constructivist principles, which emphasize conceptual understanding over passive learning. Option (d), assigning excessive homework, shifts the focus from student-centered learning to teacher-directed instruction.
Therefore, observing group activity and facilitating student problem-solving aligns with the constructivist approach, fostering active engagement, collaborative learning, and the construction of knowledge by students themselves.