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Building sets of 17 and 18
In this lesson, one of a seven-part unit from Illuminations titled “Let's Count to 20,” students explore sets of up to 18. They construct sets up to 18, write the numerals 17 and 18, and model 17 and 18 with bean sticks, cubes, and ten frames. (Learn more)
Format: lesson plan (grade K–2 Mathematics)
Provided by: Illuminations