Estimation
Iona Greenfield Carnegie Elementary School
1414 E. 61st Street
Chicago IL 60637
(312)535-0350
Objectives:
This lesson is designed for Kindergarten and First Grade.
Solve problems by guessing and checking.
Identify length by using informal units to estimate.
Guess the number of peas in a pod and write an addition and subtraction
sentence for the number of peas in the pod.
Materials Needed:
Construction paper Ribbon Peas
Scissors Bubble gum Scrap paper
Pencils Blocks Gummy bears
Strategy:
Students will draw around foot on construction paper to make foot prints.
Then they will cut them out. Students will measure using informal units.
Students will cut a piece of ribbon to their approximate head size. They
will check by using tape measure to compare actual size and approximate
size.
Guess the number of bubble gums in a jar. Check by counting.
The students will guess the number of peas in a pod and write an addition
and subtraction sentence for the number of peas in a pod. Check by using
counters (cubes or gummy bears).
Conclusions:
These activities can be implemented to solve problems by guessing and
checking using non-standard units and standard units of measurement. This
approach gives students hands on experience to solve problems.
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