Throughout these activities, you promote predicting, testing, and analyzing skills in all your students. At the end of the unit, you assess students' progress as they apply what they have learned to predict and test whether cylinders made of a mystery substance will float or sink in fresh and salt water. These activities are so engaging and the sequence so logical that students gain a real sense of accomplishment with their investigative skills.

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Students develop their own answers to why some objects float while others sink. Students test the buoyancy of a large set of objects, many of which are the same size and shape but of different composition, shape a clay boat to observe the relationship between form and buoyancy, test the weight of objects out of the water and when submerged, & use spring scales to measure the buoyant force on fishing bobbers.

Unit kit comes with a Teacher's Guide, 15 reusable Student Investigations books, 8 copies of STC BOOK: Floating and Sinking, and the materials needed for a class of 30. Added value: 8 KIDS DISCOVER Nonfiction Readers. Refurbishment Set replenishes kit consumables.

The two use kit comes with all of the great materials you’d expect from the STC Program along with a box containing the materials for a second, non-concurrent use. All you need to do is set the box aside until you are ready for it.