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## Prime Time

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**Prime Time**Lesson 1.1: Playing the Factor Game**Materials**• Labsheet 1.1 (1 per pair) • colored pens, pencils, or markers**Vocabulary**• (whole number) factor • (whole number) divisor • proper factor**Goals**• Become familiar with the factors of the numbers from 2 to 30 • Review multiplication and division of small whole numbers • Begin to recognize the difference between prime numbers and composite numbers • Relate dividing and finding factors of a number**Launch**• As you play the game, think about these questions: Is it better to go first or second? Why? What is the best first move? Why? How do you know when the game is over? How do you know when you have found all the factors of a number?**Explore – 20 Minutes**• A – F on page 9 40 Min. 30 Min. 20 Min. 10 Min.