Curated OER
The Calendar
Learners 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
How Many Days Are in a Year?
Students create a calendar for an imaginary planet. For this earth science lesson, students analyze the errors on the different calendars used on Earth. They present their work in class.
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,...