Institute for Dynamic Educational Advancement
Web Exhibits: Calendars Through the Ages: Announcing the Sky
Well-organized website depicts the "Fascinating history of the human endeavor to organize our lives in accordance with the sun and stars." Gives an overview and specifics of the basis of calendars through the ages.
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...
Scholastic
Scholastic Internet Field Trip: Calendars & Time Measure
Study the math and history involved in the development of the 12 month calendar. There are lots of links to informative time and calendar websites to assist you.
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.
British Library
British Library: Teaching Resources: Putting Julius Caesar in Context: A Summary of Sources
This summary of sources is a quick and easy way to explore the contexts for Julius Caesar - from early modern views on ghosts and tyrannicide to later readings of the play in light of fascist ideas. Included are ideas for activities and...
Institute for Dynamic Educational Advancement
Web Exhibit: The Christian (Julian) Calendar
This website gives very detailed information about all aspects of the Christian (Julian) calendar.
Other
Livius: Caesar's Calendar Reform
A selection from Plutarch that highlights Caesar's desire to reform the calendar and how he came about with the changes he enforced.
Other
Timekeepers.org: Calendar History
Scroll down this page to see the various topics addressed on this website. Learn a "brief history of the Western Calendar" as well as information about the ancient calendars of the world, including the Sumerian, Egyptian, and Greek...