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- Building sets of 11 and 12
- In this lesson, one of a seven-part unit from Illuminations titled “Let's Count to 20,” students explore sets of 11 and 12. They use bean sticks, connecting cubes, and ten frames to construct sets of 11 and 12, and then record and compare them. (Learn more)
- Format: lesson plan (grade K–2 Mathematics)
- Provided by: Illuminations

