The purpose of this lesson is for students to subtract from a teen number.
- Action and Expression
- Subtract within 20 in a way that makes sense to them.
- Let’s subtract from a teen number.
- Each group of 2 needs a set of Number Cards 0–10 and a set of Number Cards 11–20 used in a previous lesson.
|Activity 1||20 min|
|Activity 2||20 min|
|Lesson Synthesis||10 min|
Teacher Reflection Questions
As you move into a section that focuses on different subtraction methods, how can you continue to develop students' understanding of the relationship between addition and subtraction and encourage students to work flexibly with both operations?
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