Concord Consortium
Leap Years and Calendars
How many birthdays do leap year babies have in a lifetime? Learners explore the question among others in a lesson focused on different calendar systems. Given explanations of the Julian, Gregorian, and Martian calendars, individuals use...
Student Handouts
What Year Is It?
This page includes a space to write in the date, but what does the date even mean? And where does it come from? Inform your class about the various calendars and how the Western calendar came into widespread use with an informational...
Curated OER
The Calendar
Young scholars engage in an overview of solar and lunar calendars, their history and lore. Also, of the day and the month, and their relations to the rotation period of the Earth and the orbital period of the Moon.
Curated OER
Leap Year
In this Leap Year reading comprehension worksheet, can learn about the various types of calendars (lunar, solar, etc.) and answer 7 multiple choice questions. Also included is a word search of key terms.
Curated OER
My 2011 Resolution: Investigate Mathematics of Calendars and Fitness
Ring in the new year with interdisciplinary units related to the development of calendars and getting fit.
Curated OER
How Many Days Are in a Year?
Learners create a calendar for an imaginary planet. In this earth science lesson, students analyze the errors on the different calendars used on Earth. They present their work in class.
Curated OER
Time and Timetables
In this recognizing time and timetables worksheet, students compare Julian and Gregorian calendars, determine leap years, and apply the formula for finding the day of week and Easter day for any year. Students solve 20 problems.
Illustrative Mathematics
Comparing Years
Who knew that the Egyptian, Julian, and Gregorian year were different lengths? Your mathematicians will! They will have to calculate the difference between the years in seconds and find the percent change. Using dimensional analysis,...
Curated OER
Engaging Students with the History of Time
Researching the history of calendars and time-keeping devices can help students make sense of time measurement.
Curated OER
The Sled Problem
In this algebra instructional activity, high schoolers try to figure out if a sled being auctioned is real or fake with the carvings of G. Washington on it. There is an answer key.
Curated OER
Christmas Lesson Plans
Students learn about the Christmas season through music, research, and other activities.
Curated OER
Correlating Atmospheric Data Lesson Plan
Students make and test hypotheses about atmospheric data collected aboard the NOAA ship Ronald H. Brown research cruise.
Curated OER
Skin of Our Teeth by Thornton Wilder
In this allusion learning exercise, learners work in pairs to define the allusions assigned to them from the play 'Skin of Our Teeth.' Students present their research to the class.
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.
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.
Wolfram Research
Wolfram Science World: The Julian Calendar
This site from Science World under Wolfram Research contains brief information about the Julian Calendar. The information is factual and interesting, and it also contains links for further information on the subjects.
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.
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...
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.
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.
Authors Calendar
Author's Calendar: Gore Vidal
This site, from a public library in Finland, provides information on Gore Vidal's life, a list of works by and about him, and other interesting information.
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...
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...
Library of Congress
Loc: George Washington Was Born Feb. 22
An interesting background on the origin of Presidents' Day, and the actual date of George Washington's birth. Includes a portrait of Washington, as well as an historical letter from Tobias Lear, recounting the Julian and Gregorian...