**Recall the steps to find the greatest common factor of a set of numbers with this math reference sheet.**

**How Do You Find the Greatest Common Factor?**

Are your students learning to find the greatest common factor of 2 or more numbers? This 6th-grade math skill is important when working with fractions, especially when finding common denominators.

If it has been a while since you’ve taught students how to find the GCF, no worries! Teach Starter has you covered with a poster you can use and then pass on to your students to keep as a reference tool.

To find the greatest common factor (GCF) of two or more numbers, you can use the “divide and conquer” method.

The divide and conquer method involves:

- Listing the factors of each number
- Finding the common factors among the numbers
- Determining which common factor is the largest

**How to Make the Most of Your GCF Reference Sheet**

- Print the poster and display it in your classroom for students to reference when doing independent work.
- Print the poster, slip it into a clear sleeve and use it in your guided groups as a reminder.
- Print the poster, slide it into a clear sleeve and hang it on a ring as a reference tool for a learning center.

We’ve also come up with bonus ways to turn posters into interactive tools that really make your lessons stick!

📝 **Create a fill-in-the-blank worksheet** by removing selections of text.

📂 **Place copies in students’ homework folders** for reference.

💻 **Provide posters as digital resources** for virtual students.

🧠 **Test students’ memories** by showing them the poster, then hiding it and having them tell you what they remember.

**✅ Incorporate posters into your lesson wrap-up:** students write on a sticky note what they learned from the lesson and place it on the poster.

**Before You Download**

This resource prints as a PDF. Please use the dropdown menu to choose between the full-color, black and white, or editable Google slides version.

Fill your classroom with more posters and interactive displays!

This resource was created by Jillian Sloane, a teacher in West Virginia and a Teach Starter Collaborator.

Spend more time lesson-*doing* and less time lesson-*planning* when you grab these activities and teaching resources too!

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#### Greatest Common Factor and the Distributive Property Worksheets

Determine the GCF and use the distributive property to express the sum of two whole numbers as a multiplication equation with a common factor.

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#### Greatest Common Factor – Task Cards

Practice how to find the greatest common factor (GCF) with this set of 24 task cards.

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#### Greatest Common Factor – Mini Book

Learn different strategies to find the greatest common factor with this mini-book.

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