Unit 2, Lesson 20
1 More or 1 Less with Towers and Numbers
Kindergarten
Preparation
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 1 less and the tower and number just after the given number shows 1 more. Students also discuss how to use the count sequence to identify 1 less and 1 more than a given number.
In the Lesson Synthesis, students practice saying the verbal count sequence to 20. Add variety to the counting by using movement. For example, students can count as they clap, stomp their feet, or jump.
- Engagement
- MLR8
- Identify and represent a number that is “one more” or “one less” than a given number.
- Let’s find 1 more or 1 less than a number.
Required Materials
Activity 1
Activity 2
Activity 3
Required Preparation
- Each group of 2 needs cube towers of 1–10 and number cards 1–10..
- Gather materials from:
- Math Stories, Stage 1
- Math Libs, Stage 1
- Number Race, Stage 1
Suggested Centers
NoneTeacher Reflection Questions
In future lessons, students will compare written numbers 1‒10. How does the work with 1 more and 1 less help prepare students for this work?