What types of curtains do you want in the bedroom where a baby is trying to nap mid-day? How can we really figure out a way to figure out if we can see through a material or not? By testing them, of course!
Using a paper that said, "Can you see the letters?" Kindergartners were able to see the differences between various materials. They determined if the materials were transparent (we can see through it clearly), translucent (you can kind of see through it), and opaque (you can't see through it at all). They graphed their results to see the quantities they had of each.