The purpose of this lesson is for students to practice adding within 20.
In Activity 1, students learn stage 1 of the center, How Close? In Activity 2, students learn stage stage 3 of the center, Five in a Row. In both activities, students have opportunities to apply methods and concepts from the section such as counting on, making a ten, adjusting addends (using known facts), and using the commutative and associative properties.
- Action and Expression
- Students add two and three numbers within 20.
- Students write equations with three addends.
- Let’s play games where we add and subtract.
|Activity 1||20 min|
|Activity 2||20 min|
|Lesson Synthesis||10 min|
Teacher Reflection Questions
What methods are students using to add three numbers? What questions have you asked to encourage them to make a ten?
Print Formatted Materials
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