- Your students will need to go outside for this center. They will need to find a "leafy" tree (no pines) in the schoolyard. A suitable tree will have branches low to ground where individual leaves can be counted. If this is not available, wait for your school gardener to do the regular trimming and ask him/her to save a branch for your class.
- Pose the following question to your students: How many leaves does the tree have? (approximately)
- In center groups, let students work together to figure out this problem. They need to come up with a plan of action for this one and need to consult you if they are stuck. Try to steer them toward the tool of estimation.
- Make sure the group assigns a Recorder to explain the different steps involved in their planned procedure.
- After all of the groups have been to this center, compare results. Discuss methods used and what estimation methods are best.
- The base method for estimating the number of leaves is to count the number of leaves on a typical branch, count the total number of branches (or estimate) and then multiply. This will give a
*very rough*estimate. Older students should take into consideration the different lengths of branches and the "tapering" effect of the length as the tree's height increases.

- Olympic Rings
- The Mayflower Compact
- Author Spotlight
- Money from Around the World
- Moon Months
- Candy Heart Count
- Sand Separation
- Cinco de Mayo Lookup
- Junk Ship
- Columbus Acrostic
- Picture Replicas
- Spin-and-Spell
- Where Is This?
- Division with Models
- Always Say Never Sometimes
- Election 2000
- The Great Wall of China
- Am I a Square?
- Time Capsule Diorama
- Observe An Inchworm
- To Float or Not To Float
- Hand Sculpture
- Beast Feast
- The Stars and Stripes
- Dancin’ Raisins
- Spaghetti vs. Macaroni
- Martin Luther King Jr.
- Corn on the Cob
- Guided by the Stars
- Alphabetizing Mania!
- What’s My Name Worth?
- "A Busy Year" Reading
- Balloon Rocket
- Travel Brochure
- What Happens to the Paper?
- Anthropomorphism
- Pumpkin Measurements
- Tri-Angles
- Write the Words
- Alphabetizing Objects
- Twelves
- Food From Around the World
- Tack Probability
- Discover Pi
- Hero or Not?
- How Long Would It Take?
- Back to Back
- Interview a Veteran
- Cinderella, Cinderella
- Pattern Necklaces

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