Lesson 13
Center Day 3
Lesson Purpose
The purpose of this lesson is for students to practice adding 2 two-digit numbers with composing a ten.
Lesson Narrative
In each activity, a new stage of a center is offered as a choice as students choose from previously introduced centers. All of the centers focus on working with two-digit numbers.
Learning Goals
Teacher Facing
- Add numbers within 100.
Student Facing
- Let’s add 2 two-digit numbers.
Required Materials
Materials to Gather
- Connecting cubes in towers of 10 and singles
- Materials from previous centers
- Number cubes
- Paper clips
- Two-color counters
Materials to Copy
- Five in a Row Addition and Subtraction Stage 6 Gameboard
- Target Numbers Stage 3 Recording Sheet
Required Preparation
Activity 1:
- Gather materials form previous centers:
- Target Numbers, Stages 1-2
- Number Puzzles, Stages 1-4
- Mystery Number, Stage 1
Activity 2:
- Gather materials from previous centers:
- Five in a Row, Stages 1-6
- Get Your Numbers in Order, Stage 1
- Grab and Count, Stage 2
Lesson Timeline
| Warm-up | 10 min |
| Activity 1 | 20 min |
| Activity 2 | 20 min |
| Lesson Synthesis | 10 min |
Teacher Reflection Questions
As students worked in centers today, whose ideas were heard, valued, and accepted? How can you adjust the group structure for your next center day, to ensure each student’s ideas are heard?