Can two people get the same number of drops on a penny?
Pretty much. But not without a plan.
We generated a long list of variables that can influence the number of drops on a penny: 22 items on the list.
What causes differences in the number of drops that a penny can hold?
Then we went to the lab and tried to standardize as many variables as possible. Things were looking good!
To wrap up we gathered and related the number of drops each group counted.
Uh oh.
While partners were able to get similar numbers, the whole class had wide variation.
What’s going on now?