Classroom Close-Up
“We used our slide to find out how different objects would move when placed on a ramp. We used Popsicle sticks, a pen cap, ping-pong balls, rubber balls, marbles, an eraser, and a penny. The kids sorted the objects into two groups—the ones that rolled and the ones that slid. The eraser caused some discussion, because it slid a little bit and then stopped. Zoe, the student who sent it down the slide, suggested an explanation: “The eraser is made out of rubber, so that is why it stopped and didn’t hit the bottom of the slide.”
- Kira, preschool teacher