Have instructions on the board for students to find the circumference of a student circle. They must hold hands to form a circle. Then they must work as a group to figure out how to find the circumference. It is interesting to see if your students choose to measure the circumference by measuring the diameter or by directly measuring the distance around the circle.

- Egg Color Estimation
- Shapes Around the Room
- Hand Sketch
- Millennium Countdown
- Most Used Letters Tally
- Halloween Probability
- Population in 2040
- Symmetry
- National Anthem
- Search for Adjectives
- Order by Birthdays
- Columbus Quote
- Class Percentages
- Unscramble the Words
- Circumference of Student Circle
- Fractions of an Apple
- Blind Drawing
- Complete the Patterns
- Population Make-up
- Candy Graph
- A to Z States
- Food List
- Fast Food Chain
- Pumpkin Seeds
- Fish Algebra
- Who Celebrates First?
- Consumer Price Index
- Advertising Effectiveness
- Kernels of Corn
- All About Hanukkah
- The Chicken or the Egg?
- Turn Everyone Off
- Temperature Averages
- Strings by Length
- Base, Acid, or Neutral
- Y2K
- Pumpkin Seed Estimation
- Create a Sentence
- Arm Length
- One Food Only
- What Do the Books Have in Common?
- Replicate the Design
- Ferdinand Magellan’s Voyage
- Grammar Corrections
- Olympic Cities
- F is for Fall
- Student Pursuit
- Test Your Observation Skills
- Ireland
- Sentence Sense

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