GCF and LCM Project, Day 2

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Objective

SWBAT find the GCF and LCM of numbers.

Big Idea

Students collaborate on a project.

Lesson Author

Ursula Lovings

Brooklyn, NY

Grade Level

Sixth grade

Subjects

Math

Number Sense and Operations

Fractions

Standards

6.NS.B.4

Find the greatest common factor of two whole numbers less than or equal to 100 and the least common multiple of two whole numbers less than or equal to 12. Use the distributive property to express a sum of two whole numbers 1–100 with a common factor as a multiple of a sum of two whole numbers with no common factor. For example, express 36 + 8 as 4 (9 + 2). Apply and extend previous understandings of numbers to the system of rational numbers.

MP1

Make sense of problems and persevere in solving them.

MP3

Construct viable arguments and critique the reasoning of others.

Introduction

5 minutes

I will remind students of the expectations I have of them:

1. Work together

2. Respect each other

3. Stay on task

On day 1 of the project, students should have completed the problem individually and discussed their work and answers with their group. The focus of today is for groups to agree on a method and work to display on the chart paper. Then they will work together to complete the poster.

I will remind students that all of their work should be on the poster, but they shouldn't include their final answers. Since this is the last day to complete the project, I will frequently give students time checks.

Project Assignment

35 minutes

Groups will continue with their project. This is a work day in which they are expected to complete the project.

Group 1: Find the GCF and LCM of 42 and 24

Group 2: Find the GCF and LCM of 14 and 35

Group 3: Find the GCF and LCM of 32 and 56

Group 4: Find the GCF and LCM of 24 and 60

Group 5: Find the GCF and LCM of 36 and 42

Group 6: Find the GCF and LCM of 40 and 65

Group 7: Find the GCF and LCM of 30 and 48

Group 8: Find the GCF and LCM of 30 and 72

As groups continue to work on the project for the second day, I will circulate throughout the classroom, answer any questions that are raised, and keep them on pace.

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6th Grade Math » Number Sense