Group Investigation is an effective or genezational medium for encouraging and guiding students' involvement in learning Students actively share in influencing the nature of events in their
classroom Also, by communicating freely and cooperating in planning and carrying out their chosen topic of investigation, they can achieve more than they would as individuals The final result of the group's work reflects each member's contribution, but it is intellectually richer than work done individually by the same students. In planning and carrying out Group Investigation, students progress through six consecutive stages. These stages can be compressed into a week or two, or they can be carried out over several weeks or even months, depending on the scope of the topic under investigation and the skillfulness of the students and the teacher.