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Social Studies · All grades

The Mystery of the Missing Months: A History of the Roman Calendar

Students explore how the ancient Roman calendar developed from a ten-month system into the Julian and Gregorian calendars.

$3USD · Digital download

Students explore how the ancient Roman calendar developed from a ten-month system into the Julian and Gregorian calendars. The lesson includes an informational reading, vocabulary and Latin-root activity, and a See-Think-Wonder reflection.

2 pagesof ready-to-use material · PDF
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What you’ll teach

Clear goals. Useful learning.

  • Students will identify the Latin numerical roots in September, October, November, and December.
  • Students will explain why the original Roman calendar began in March.
  • Students will describe how January and February changed the order of the Roman months.
  • Students will connect Latin roots to related English vocabulary.