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?
High schoolers create a calendar for an imaginary planet. In this earth science lesson plan, 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 worksheet, students 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
Learners 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 worksheet, students work in pairs to define the allusions assigned to them from the play 'Skin of Our Teeth.' Students present their research to the class.