University of Hawai'i
University of Hawaii: Time Zones
This site is provided for by the University of Hawaii. Students will learn about the purpose of time zones and then use time zone maps to calculate the time and day in a specific area.
NOAA
Noaa: Solar Calculators
This resource allows users to find sunset/sunrise calculations based on latitude and longitude for various locations. Provides a glossary of related terms and an explanation of their calculations.
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.