# Lesson 11

Center Day 2 (optional)

### Lesson Purpose

The purpose of this lesson is for students to practice adding numbers within 1,000.

### Lesson Narrative

This lesson is optional because it is an opportunity for extra practice that not all classes may need. In Activity 1, students learn stage 4 of the How Close center. In this new stage, called Add to 1,000, students pick 8 digit cards and then choose 6 of those to make an expression that yields a number as close as possible to the target number, 1,000. In Activity 2, students learn stage 8 of the Five in a Row center, Add within 1,000 with Composing, and then choose to continue working on Five in a Row, or choose between two previously introduced centers focused on addition with three-digit numbers.

### Learning Goals

Teacher Facing

• Add numbers within 1,000.

### Student Facing

• Let’s add numbers within 1,000.

### Required Materials

Materials to Gather

Materials to Copy

• Five in a Row Addition and Subtraction Stage 8 Gameboard
• How Close? Stage 4 Recording Sheet

### Required Preparation

Activity 2:

• Each group of 2 needs 10 counters and 2 paper clips.
• Gather materials from:
• Five in a Row, Stages 7–8
• How Close, Stage 4

Addressing

### Lesson Timeline

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

### Teacher Reflection Questions

When do your students feel successful in math? How do you know?

### Print Formatted Materials

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### Additional Resources

 Google Slides For access, consult one of our IM Certified Partners. PowerPoint Slides For access, consult one of our IM Certified Partners.