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]
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...