Unit 5, Lesson 12
How Many Are Missing?
Kindergarten
Preparation
Lesson Narrative
In a previous lesson, students matched equations to compositions and decompositions of 10. In the first activity, students show many different compositions and decompositions of 10 with red and yellow counters. Students may know 5 and 5 as a way to compose and decompose 10, because this structure is highlighted when using fingers and 10-frames. In this lesson, students develop familiarity with other ways to compose 10. In the second activity, students determine how many counters are needed to fill a 10-frame.
- Engagement
- MLR8
- Determine the number that makes 10 when added to a given number.
- Match (orally) equations and counters on 10-frames that represent the same compositions and decompositions of 10.
- Let’s fill 10-frames in different ways.
Required Materials
Activity 1
Activity 2
Activity 3
Required Preparation
- Each group of 2 needs 1 cup and 10 two-color counters.
- Gather materials from previous centers:
- Shake and Spill, Stages 1–3
- Counting Collections, Stage 1
- Roll and Add, Stages 1 and 2
Suggested Centers
NoneTeacher Reflection Questions
Reflect on your experience with the Which Three Go Together warm-up in the curriculum. What moves or questions have improved the learning for each or your students during this routine? What improvements would you make next time?