This lesson plan is designed to have young children explore the concept of sinking vs. floating by using the skills of prediction, observation and classification.

For a dramatic illustration of density check out this demonstration. It's simple to do, only requiring a bowling ball and some water.

Students investigate with common objects to see if they can make something that neither floats nor sinks, but rather "flinks" in the middle.

Throughout the activities in this investigation, students may have wondered how a boat made out of steel, which is more dense than water, can float. This activity addresses that question. Students will see that changing the shape of an...

The tradebook, Who Sank the Boat? by Pamela Allen, is an excellent tool in teaching measurement. Students will engage in activities involving different types of measurement. In the story, five animal friends decide to take a boat ride....