They ventured through the process of scaling the items on the scale measurement tool. As they observed the materials were grouped respectively, handled and explained by the recycling workers from a private recycling company, and also from the teachers, students were able to identify the mass weights of the recyclable items human had had produced in everyday life.
Students also were able to predict that the recyclable items could be used again to produce new products. Recycling was also meant to save the used resources, at least to minimise from extensive exploration of natural resources solely for humans' use.
Although the students understood a little about recycling and were eager to know more of what would happen to the items next, they did understood that they needed to save the planet from humans' massive wastes around the world, particularly in their own country.