Unit 6, Lesson 3
Choose Objects to Compare Length Indirectly
Grade 1
Preparation
Lesson Purpose
The purpose of this lesson is for students to compare the lengths of two objects that cannot be compared directly.
Lesson Narrative
In the previous lesson, students used a string to compare two lengths indirectly.
In this lesson, students choose their own object to compare the lengths of two other objects indirectly. Throughout the lesson, students make their own choices about what objects to use and how to use them to compare the lengths of two other objects (MP5). Students also have opportunities to see and compare the different choices that their peers make. These conversations help prepare students for iterating same-sized length units to measure length in future lessons.
- Engagement
- MLR8
- Explain (orally) how to select and use a tool to compare two lengths indirectly.
- Let’s compare the lengths of objects without moving them.
Required Materials
Activity 2
Required Preparation
Activity 1
- Each group of 2 needs:
- Connecting cubes in singles and towers of 10
- 6-inch and 10-inch pieces of string
- Unsharpened pencil
- Scissors
Activity 2
- Each group needs measuring materials from the previous activity including lengths of string up to the length of the longest object in the classroom students will measure.
Suggested Centers
NoneTeacher Reflection Questions
How does indirect comparison prepare students to measure length by iterating length units in future lessons?
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