**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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