"I need you to make predictions on how many drops of water a coin can hold. Put it in writing like this: 'I think ____ drops for a quarter, ____ drops for a dime and ___ drops for a penny.' Once you make your prediction, collect your supplies for the experiments. What else will we need besides coins?" asked Allison Langworthy, Jefferson Middle School fifth-grade teacher, to her classroom with students of varying grade levels.