Lesson 5

Center Day 1

Lesson Purpose

The purpose of this lesson is for students to practice adding and subtracting a multiple of 10 from a multiple of 10 and to practice adding and subtracting within 20.

Lesson Narrative

In Activity 1, students learn stage 3 of the Check It Off center. In this new stage, called Add or Subtract Tens, students pick two number cards that are multiples of 10 (0–90) and choose whether to make an addition or subtraction expression. In Activity 2, students choose from previously introduced centers that also focus on adding and subtracting.

  • Action and Expression
  • MLR8

Learning Goals

Teacher Facing

  • Add and subtract multiples of 10 from multiples of 10.
  • Add and subtract within 20.

Student Facing

  • Let’s add and subtract.

Required Materials

Materials to Gather

Materials to Copy

  • Number Cards, Multiples of 10 (0-90)
  • Check It Off Stage 3 Recording Sheet

Required Preparation

Activity 1:

  • Create a set of cards from the blackline master for each group of 2.

Activity 2:

  • Gather materials from previous centers:
    • Five in a Row, Stages 1–4
    • How Close, Stages 1 and 2
    • Number Puzzles, Stages 1 and 2

CCSS Standards

Lesson Timeline

Warm-up 10 min
Activity 1 15 min
Activity 2 25 min
Lesson Synthesis 10 min

Teacher Reflection Questions

What do your students think it means to be good at math? How are you helping them change negative impressions they might have about their ability to reason mathematically?

Print Formatted Materials

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

Additional Resources

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