ReadWriteThink
Read Write Think: On This Day in 1918, the u.s. Passed the u.s. Standard Time Act
A classroom activity commemorating the 1918 Standard Time Act and aiding students in learning about differing time zones. Includes lesson plans, web links and an annotated bibliography. From March 19, 2007.
PBS
Pbs Teachers: Time Travel
Use this NOVA instructional activity to discuss the nature of time and the grandfather paradox. Examine time from different perspectives by plotting ages on a timeline, estimating how long a minute is and imagining going back in time to...
Harvard University
Harvard Smithsonian: Everyday Classroom Tools
The focus of this series of lessons is to engage students in an exploration of the world around them. The emphasis is on inquiry as students learn about the earth, sun, light, shapes and more.