The students had access to ample information, and sufficient time was provided to carry out
these investigations. Each student was given a specific task. Each group was supposed to
prepare charts and each student was to present the information verbally to the class. Group
performance was judged by the teacher on the basis of (i) content coverage (ii) quality of
written and oral presentations (iii) overall group performance and (iv) quality of the placard
on noise pollution. Students were informed of the criteria for assessing their work, both
individually and within the –group. Data Collection and Analysis