# Lesson 10 Center Day 2

Let’s measure the length of objects.

## Warm-up True or False: Adding within 100

Is each statement true or false?

Be prepared to explain your reasoning.

## Activity 1 Introduce Estimate and Measure, Choose Your Unit

We are going to learn a new center called Estimate and Measure, Choose Your Unit. In this activity, you choose an object that you will measure. Then you choose the unit you would like to use to measure the object. Record the object and the unit you will use to measure. Before measuring the object, make an estimate of the object’s length. Record your estimate. Then measure the object and record the actual measurement.

## Activity 2 Centers: Choice Time

Choose a center.

How Close?

Target Numbers

Five in a Row