#34 Pendulums - Get Materials
Key: (1st/2nd/3rd) denote needed quantities: (1st) enough for 1 student doing all activities; (2nd) enough for 30 students working in self-paced pairs; (3rd) enough for 30 students working in pairs on the same lesson. Starred* items may be purchased below.
* 1/2/2: boxes paper clips of uniform size and weight* 1/2/2: spools of thread
1/15/15: pairs of scissors
* 1/2/2: rolls masking tape
1/15/15: wristwatches to measure seconds (or a wall clock visible to all)
1/5/15: meter sticks
2/20/30: styrofoam cups
* 1/5/15: plastic drinking straws
* 2/10/30: rubber bands
10/60/150: pennies
1/5/15: wire clothes hangers
3/15/45: heavy books
1/1/1: ball string
* 3/15/45: clothespins
1/5/15: felt-tip pens -- must be smooth and free-flowing
