The purpose of this activity is for students to learn Stage 1 of a new center called Estimate and Measure. Students choose an object and a familiar unit to measure it with. They estimate the measurement of the object and then measure to find the actual length to the nearest whole length unit. 

• Display an object measured with gaps between some of the length units.
• “What feedback could you give to someone who measured like this?” (There should not be any gaps.)
• Display an object measured with different length units such as centimeter cubes and connecting cubes.
• “What feedback could you give to someone who measured like this?” (You have to use the same object to measure the entire length of the object. You can't use small and big cubes, you have to choose one.)

The purpose of this activity is for students to choose from activities that focus on adding within 100. Students choose any previously introduced stage from these centers:

• How Close?
• Target Numbers
• Five in a Row

• “What method of adding did you use most today?” (I added tens to tens and ones to ones. I made a ten.)