Lesson 9

Muéstrame tu número

Lesson Purpose

The purpose of this lesson is for students to represent the base-ten structure of two-digit numbers with drawings, words, and addition expressions that show the value of the tens and ones.

Lesson Narrative

In previous lessons, students interpreted different ways to represent a two-digit number as some tens and some ones. In this lesson, students create a collection with connecting cubes to represent a two-digit number and use what they have learned in previous lessons to represent the collection in as many ways as they can. They participate in a gallery walk in which they observe other collections, represent the collections in as many ways as they can, and compare their representations with their partner.

  • Action and Expression

Learning Goals

Teacher Facing

  • Represent the base-ten structure of two-digit numbers with drawings, words, and addition expressions.

Student Facing

  • Mostremos números de diferentes formas.

Required Preparation

Activity 2:

  • Students’ collections from the previous activity are needed for the gallery walk.

Activity 3:

  • Gather materials from previous centers:
    • Grab and Count, Stage 2
    • Shake and Spill, Stages 3–5
    • Check It Off, Stages 1–3

Lesson Timeline

Warm-up 10 min
Activity 1 10 min
Activity 2 15 min
Activity 3 15 min
Lesson Synthesis 10 min
Cool-down 0 min

Teacher Reflection Questions

What unfinished learning or misunderstandings do your students have about representing tens and ones? How did you leverage those misconceptions in a positive way to further the understanding of the class?

Print Formatted Materials

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Student Task Statements pdf docx
Lesson Cover Page pdf docx
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Teacher Presentation Materials pdf docx