Beginning with a description that sets the stage, learners are asked to break down the numbers 42 and 63 to find the greatest common denominator using factor trees. As they work through the factoring process, young mathematicians are asked to respond to five questions about the GCF, prime numbers, and the relationship between factors and multiples.

Concepts

factor trees, common factors, greatest common factor

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Additional Tags

math

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Instructional Ideas

• Use as an instructional tool during a lesson on GCF
• Assign the link to Google Classroom 

Classroom Considerations

• Requires a free CK-12 account to access the materials
• The learn more link provides further expansion on the topic

Pros

• Contains five questions that have both open ended and multiple choice responses

Cons

• None

Common Core

6.NS.B.4