Bell Ringer
Today's bell ringer was a "Would You Rather"
I ask students to work as a table group to make their decision, however, it must be supported by mathematics.
Lesson Frame
- We will take notes about factors, multiples, prime and composite, to use during our rotations next week.
- I will explain the importance of factors when working with prime/composite numbers.
Lesson
We began our lesson discussing FACTORS. We defined factors as "the two numbers multiplied together to get a product". (Factor x Factor = Multiple) Then we found the factors of 24 using a multiplication table. Finally, we listed all of the factors in order from least to greatest and formed our "rainbow".
Next we moved into multiples. We defined this as the answer to a multiplication problem, or a product. I mentioned that an easy way to remember what a multiple is would be to use skip counting.... there are many multiples.
Finally we worked our way through finding prime an composite numbers. We began by defining a prime number as having only 2 factors. Composite numbers have more than two factors. To filter out the composite numbers, we worked through the "Sieve of Eratosthenes" to filtering out multiples. The final result:
Once we finished the notes, students got onto Khan Academy and began watching videos and doing lessons on Factors.
Close
Explain the importance of factors to determining if a number is prime or composite.
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