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Western Washington University: Leap Year
It takes the entire page but by the end of it, you will understand the whys and whens of Leap Year Day.
TED Talks
Ted: Ted Ed: The Leap Year Explained
Every four years, we gain an extra calendar day. Neil deGrasse Tyson explains the science behind the leap year. [3:22]
Mocomi & Anibrain Digital Technologies
Mocomi: What Is Leap Year?
Learn when and why we have leap years.
Math Is Fun
Math Is Fun: Years
The mathematics resource discusses years. Students review the concept using the provided notes and then answer questions to check for comprehension of the topic.
National Council of Teachers of Mathematics
The Math Forum: Seventh Grade Mathematics: Cycles
Teachers can use this resource for creating interesting lessons about time and time measurement. There are articles about leap year, converting time, as well as other links for further research. An interdisciplinary project about an...
National Geographic
National Geographic: 45 Bce: Julius Caesar Takes a Leap
Why do we have an extra day at the end of February every four years? We have Julius Caesar to thank! Read this short explanation about how the calendar kept falling out of step with the seasons and Caesar's solution to the problem.
Geography 4 kids
Geography4 kids.com: Earth Around the Sun
Find out what all results from Earth revolving around the sun every 365 days as well as the rotation of the Earth every 24 hours.