Students will also Make sundials by building shadow-casters and tracing the shadows at various times of the day. Construct personal calendars, using drawings and words to record events of their recent past and predict events of their immediate future. Observe the moon's phase, predict how it will change over an extended period, and continue observations. Use aluminum foil and washers (for weights) to construct a water clock that sinks in 15 seconds. Track changes in water clocks' sinking rates and pendulums' swinging rates caused by altering one variable. Construct a clock escapement mechanism and refine it to keep its pendulum swinging for as long as possible. Finally, the students are challenged to use materials of their choice to construct a device of any type that accurately and consistently measures one minute.The class examines both the historical and scientific aspects of timekeeping from the various reading selections included throughout the appropriate sections of the unit.

With Measuring Time Kits, students conduct activities clustered around the following major focuses on tracking time through the movement of the sun and moon, experimenting with the variables that influence the sinking rate of water clocks, determining and experimenting with the variables that affect the motion of pendulums, building clock escapement mechanisms and troubleshooting their operation.

Unit kit comes with a Teacher's Guide, 15 reusable Student Investigations books, 8 copies of STC BOOK: Measuring Time, 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.