Other
The Official U. S. Time
Get the official U.S. time from the official U.S. timekeepers, the National Institute of Standards and Technology (NIST), and its military counterpart, the U.S. Naval Observatory. Java needs to be enabled to see the timeclocks. There are...
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.
National Council of Teachers of Mathematics
Nctm: Figure This: What Time Is It In?
Can you figure this? If it is afternoon in San Francisco, California, what time is it in Cairo, Egypt? Explore positive and negative number values in this one page activity using time zones from different parts of the world.