# Lesson 3

Choose Objects to Compare Length Indirectly

### Lesson Purpose

### 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 length 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 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

### Learning Goals

Teacher Facing

- Choose and use objects to compare lengths of other objects indirectly.

### Student Facing

- Let’s compare the length of objects that can’t be moved.

### Required Materials

### Required Preparation

Activity 1:

- Each group of 2 needs:
- Connecting cubes in singles and towers of 10
- 6-inch and 10-inch piece of string
- Unsharpened pencil
- Scissors

Activity 2:

- Each group needs measuring materials from the previous activity.

### CCSS Standards

Addressing

### Lesson Timeline

Warm-up | 10 min |

Activity 1 | 15 min |

Activity 2 | 25 min |

Lesson Synthesis | 10 min |

Cool-down | 0 min |

### Teacher Reflection Questions

### Print Formatted Materials

Teachers with a valid work email address can click here to register or sign in for free access to Cool Down, Teacher Guide, and PowerPoint materials.

Student Task Statements | docx | |

Cumulative Practice Problem Set | docx | |

Lesson Cover Page | docx | |

Cool Down | (log in)' | |

Teacher Guide | (log in)' | |

Teacher Presentation Materials | docx |

### Additional Resources

Google Slides | (log in)' | |

PowerPoint Slides | (log in)' |