Lesson 4

Center Day 1

Lesson Purpose

The purpose of this lesson is to practice adding and subtracting within 100.

Lesson Narrative

In the first activity, students learn stage 3 of the How Close center. In this new stage, students add 2 two-digit numbers, trying to get as close to 100 as possible. In the second activity, students choose from previously introduced centers focused on two-digit numbers.

Learning Goals

Teacher Facing

  • Add within 100.
  • Compare addition and subtraction expressions to 20.

Student Facing

  • Let’s practice adding and subtracting.

Required Materials

Materials to Gather

Materials to Copy

  • How Close? Stage 3 Recording Sheet

Required Preparation

Activity 2:

  • Gather materials from:
    • Target Numbers, Stages 1–3
    • Five in a Row, Stages 1–6
    • Get Your Numbers in Order, Stage 1

CCSS Standards

Addressing

Lesson Timeline

Warm-up 10 min
Activity 1 20 min
Activity 2 20 min
Lesson Synthesis 10 min

Teacher Reflection Questions

Identify something you thought was going to go well in math class recently, but did not. What can you do to make it a success next time?

Print Formatted Materials

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Additional Resources

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