Fourth graders discover time keeping by analyzing technological advances in history.  For this time lesson, 4th graders create and complete a KWL chart based on their research of a famous timekeeping invention, such as a sundial....

Students take a medical issue and explore it, debate it, and convince others of their point of view. They improve research skills and writing skills. Students are able to define a problem, debate it, and identify which is the best...

An illustrated history of timekeeping from ancient times to the present. Includes information on ancient calendars, early clocks, a revolution in timekeeping, world time scales and time zones, and the NIST standards.