This 28-slide PowerPoint presentation guides you through the process that leads to finding the greatest common factor of given numbers. It can be used for full class or individual instruction. The time you spend on this presentation depends on how much student involvement you allow and stopping points encountered for emphasis. This presentation is a great reference to place on your teacher webpage as well. The content is based on the 6th grade Common Core math standard: CCSS.Math.Content.6.NS.B.4.
I included as much detail & simulation as possible without making the presentation too long. It begins by stressing the importance of finding all factors for a number by referencing the divisibility rules and recommending an orderly fashion when searching for factors. A sample word problem simulates the process of breaking items into groups determined by the factors. Then it is explained how common factors are the number of equal-sized identical groups and that the GCF is the largest of these groups. A practice word problem and answer check is given at the end of the presentation to gauge understanding.
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