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Pax Checks the Numbers: Is It Reasonable?
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Quick facts
2 preview imagesAdded Nov 2026
About
Pax the polar bear works with real U.S. Census tables: speakers of Native American languages, languages spoken at home in Philadelphia and Chicago, and Philadelphia's population by age. Students add and subtract six-digit numbers, compare a total with one large number, and pick only the rows a question asks about. After each answer they check it by rounding and estimating, then choose the reason that shows the answer is reasonable. Typed answers get a spoken hint that matches the mistake, such as adding every row or stopping one step early. 12 questions, about 20 minutes, narrated throughout.
Lesson details
- Grade level
- 4th Grade
- Subjects
- Standards
- 4.NBT.B.4
- 4.OA.A.2
- 4.OA.A.3
- Length
- 13 scenes, 12 questions
- What students do
- Multiple choice
- Typed answer
- Audio
- Includes audio
- Scoring
- Includes scored questions
- Last updated
What's included
- 12 narrated questions with Census data tables
- Typed answers with hints matched to common mistakes
- Reasonableness checks after each calculation
Learning objectives
- Add and subtract six-digit numbers from real data tables.
- Compare a total with one large number to answer a question.
- Check an answer by rounding each number and estimating.
- Pick only the rows of a table a question asks about.
