Curated OER
Reasons for the Seasons
Sixth graders conduct and analyze a survey that explores public perceptions about the reasons for seasonal change. They measure the changing length of days, observe shadows and discuss how the Earth's axis of rotation affects the seasons.
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...
Institute for Dynamic Educational Advancement
Web Exhibits: Sir Sanford Fleming (1827 1915)
Here you will find the story of how and why time zones came about and the Canadian who developed the system that has become so important around the world. Be sure to read the "Incidents and Anecdotes" section to find interesting facts...