In the first activity, students decompose groups of 11–19 objects into groups of 10 ones and some more ones. Then students determine the missing part to compose numbers 11–19.
If students need additional support with the concepts in this lesson, refer back to Unit 6, Section B in the curriculum materials.
- Action and Expression
Activity 1: ¿Dónde se van a sentar?
- Compose and decompose numbers 11–19 using 10 ones and some more ones.
- Hagamos grupos de 10.
- Each group of 2 needs access to at least 2 collections of 11–19 objects.
- Students can use their bead tool from a previous lesson.
- Gather materials from:
- Shake and Spill
- Number Race
- Grab and Count
- What's Behind My Back?
- Pattern Blocks
|Activity 1||15 min|
|Activity 2||10 min|
|Activity 3||20 min|
|Lesson Synthesis||5 min|