The purpose of this activity is to count groups of between 95 and 120 length units and represent the count using representations of tens and ones. Each group measures a strip of tape using centimeter cubes. They determine how to count the cubes and create a representation. Students may group their cubes and count by tens and ones. Some students may group 10 tens as 100. 

• Display 11 towers of 10 and 3 single cubes.
• “Estos son los cubos que se usaron para medir otro animal. ¿Cómo podemos descifrar la longitud de este animal?” // “These are the cubes used to measure a different animal. How can we figure out the length of this animal?”

The purpose of this activity is for students to write numbers between 95 and 120. Groups create posters that show a drawing of how they counted their animal measurements from the last activity. Groups should not write a number for the final measurement on their posters. Students do a Gallery Walk to interpret each representation and record the count with a number in their workbooks. Group members then compare their counts and written numbers.

When students look at the different representations and determine the length of each animal, they may notice that the representation may help to accurately find the value. For example, students may draw groups of 10 cubes rather than every individual cube (MP7).

This activity uses MLR7 Compare and Connect. Advances: representing, conversing.

• Display the snake and giant anteater posters.
• “¿Cómo escribo el número que representa la longitud del zorro rojo?” // “How do I write the number that represents the length of the red fox?”
• “¿En qué parte del póster ven 100? ¿En qué parte ven 5?” // “Where do you see 100 in this poster? Where do you see 5?”
• Repeat for anteater.