Alabama Social Studies SS24.2.11

Social Studies2nd GradeHistory

The Standard

Describe segments of time, including year, decade, and century.

2024 Alabama Course of Study: Social Studies

Teacher's field guide

What Students Need to Do: Students describe a year, a decade, and a century as lengths of time. They know that a decade is 10 years and a century is 100 years.
What Mastery Looks Like: A student can label a 10-year span as a decade and a 100-year span as a century. They can explain that a century contains 10 decades.
Common Misconceptions: Students may think a decade is 10 months or a century is 1,000 years. Some count both endpoint years and say 2016 to 2026 is 11 years.
How to Assess It: Exit ticket: Label each span as one year, one decade, or one century: January 2025 to January 2026; January 2016 to January 2026; January 1926 to January 2026.

Lesson moves

Give pairs 12 month cards, 10 year cards, and 10 decade cards; have them build a year, decade, and century.
Ask students: Would you describe the age of a seven-year-old, a grandparent, and an old tree in years, decades, or centuries? Why?
Play a sorting relay with cards marked 12 months, 10 years, and 100 years; teams place each under year, decade, or century.
Show calendar pages from January 1926 and January 2026; ask students to name the length of time between them.

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