Indiana Social Studies 6.H.13
The Standard
Define and use the terms decade, century, and millennium, and compare alternative ways that historical periods and eras are designated by identifying the organizing principles upon which each is based.
2026 Indiana Academic Standards: K-12 Social Studies
Teacher's field guide
What This Standard Means
What Students Need to Do
- Students place dates in decades, centuries, and millennia. They explain whether a period name points to a ruler, a major change, or a set number of years.
What Mastery Looks Like
- A student places 1800 in the 18th century and 1801 in the 19th. They explain that the Victorian era is named for a ruler, while the Industrial Revolution is named for changes in how goods were made.
Common Misconceptions
- Students may put 1800 in the 19th century or count the 1990s as 1991 through 2000. They may assume named eras lasted the same number of years everywhere.
How to Assess It
- On an exit slip, ask: How many years are in a decade, century, and millennium? Which century includes 1850, and what does each name point to: Victorian era and Industrial Revolution?
Lesson moves
Ways to Teach It
Have students place 1850, 1901, and 2001 cards on three paper timelines marked by decade, century, and millennium.
Ask: Why does 1850 in Britain fit both the Victorian era and the Industrial Revolution? What does each name highlight?
Play century match: pairs match date cards for 1800, 1801, 1900, and 1901 to century cards, then explain one tricky match.
Show a museum webpage about a Victorian house built in 1885; students identify its century and explain what Victorian names.
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