Lesson 18

1 más o 1 menos con torres y números

Lesson Purpose

The purpose of this lesson is for students to identify 1 more or 1 less than a given number.

Lesson Narrative

Students use the cube towers from the previous lesson. They may notice that the tower and number just before the given number shows one less and the tower and number just after the given number shows one more. Students also discuss how to use the count sequence to identify one less and one more than a given number.

In the lesson synthesis, students practice saying the verbal count sequence to 20. Add variety to the counting by adding movement. For example, students can count as they clap, stomp their feet, or jump.

  • Engagement
  • MLR8

Warm-up: Actuémoslo: Tenedores para la cena

Learning Goals

Teacher Facing

  • Identify one more and one less than a given number.

Student Facing

  • Encontremos 1 más o 1 menos que un número.

Required Preparation

Activity 1:

  • Each group of 2 needs cube towers of 1–10 and number cards 1-10.

Activity 3:

  • Gather materials from:
    • Math Stories, Stage 1
    • Math Libs, Stage 1
    • Number Race, Stage 1

CCSS Standards


Building Towards

Lesson Timeline

Warm-up 10 min
Activity 1 10 min
Activity 2 15 min
Activity 3 20 min
Lesson Synthesis 5 min
Cool-down 0 min

Teacher Reflection Questions

In future lessons, students will compare written numbers 1-10. How does the work with one more and one less help prepare students for this work?

Print Formatted Materials

Teachers with a valid work email address can click here to register or sign in for free access to Cool Down, Teacher Guide, and PowerPoint materials.

Student Task Statements pdf docx
Lesson Cover Page pdf docx
Teacher Guide Log In
Teacher Presentation Materials pdf docx