Unit 6, Lesson 8
Groups up to 110
Grade 1
Preparation
Lesson Purpose
The purpose of this lesson is to measure length and count and read numbers to 110.
Lesson Narrative
In previous units, students counted quantities and read and wrote numbers up to 99. In previous lessons of this unit, students measured the length of objects.
In this lesson, students count a quantity between 100 and 110. In the first activity, students measure how tall they are using centimeter cubes and represent their work in a way that makes sense to them. In the second activity, students make sense of representations of larger numbers. In the Lesson Synthesis, students learn that 10 tens is 100.
- Action and Expression
- MLR8
- Explain (orally) strategies for organizing and counting length units when measuring a length up to 110 length units.
- Match (orally) base-ten diagrams and base-ten numerals that represent the same value.
- Let’s measure lengths that are longer than 100 cubes.
Required Materials
Activity 1
Required Preparation
Activity 1
- Each group needs 120 centimeters cubes and a piece of string that is 100–110 centimeters long.
Activity 2
- Create a set of cards from the backline master for each group of 2.
Suggested Centers
NoneTeacher Reflection Questions
Reflect on times you observed students listening to one another’s ideas today in class. What norms would help each student better attend to their classmates' ideas in future lessons?
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