1. Lesson 1.1: Playing the Factor Game
Prime Time
Lesson 1.1:
Playing the Factor Game

2. Materials
Labsheet 1.1 (1 per pair)
colored pens, pencils, or markers

3. Vocabulary • (whole number) factor • (whole number) divisor
• proper factor

4. 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

5. Launch

6. Launch

7. Launch

8. Launch

9. Launch

10. 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?

11. Explore – 20 Minutes A – F on page 9 40 Min. 30 Min. 20 Min. 10 Min.
Check the Teacher Guide for questions to ask as you walk around. Try not to tell the students how to do the exploration, instead guide the students’ thinking by strategic questioning.
40 Min.
30 Min.
20 Min.
10 Min.

12. 40 Minutes Remaining

13. 39 Minutes Remaining

14. 38 Minutes Remaining

15. 37 Minutes Remaining

16. 36 Minutes Remaining

17. 35 Minutes Remaining

18. 34 Minutes Remaining

19. 33 Minutes Remaining

20. 32 Minutes Remaining

21. 31 Minutes Remaining

22. 30 Minutes Remaining

23. 29 Minutes Remaining

24. 28 Minutes Remaining

25. 27 Minutes Remaining

26. 26 Minutes Remaining

27. 25 Minutes Remaining

28. 24 Minutes Remaining

29. 23 Minutes Remaining

30. 22 Minutes Remaining

31. 21 Minutes Remaining

32. 20 Minutes Remaining

33. 19 Minutes Remaining

34. 18 Minutes Remaining

35. 17 Minutes Remaining

36. 16 Minutes Remaining

37. 15 Minutes Remaining

38. 14 Minutes Remaining

39. 13 Minutes Remaining

40. 12 Minutes Remaining

41. 11 Minutes Remaining

42. 10 Minutes Remaining

43. 9 Minutes Remaining

44. 8 Minutes Remaining

45. 7 Minutes Remaining

46. 6 Minutes Remaining

47. 5 Minutes Remaining

48. 4 Minutes Remaining

49. 3 Minutes Remaining

50. 2 Minutes Remaining

51. 1 Minute Remaining

52. Time’s Up!!!

53. Summarize
What do you think is a good strategy for playing the Factor Game?
Do you think their strategies are good ones?

54. Assignment
ACE
pp. 14 – 18
Problems 1 – 7; Connections 28 – 31; Extensions 39
Suggested Assignment in beginning of Teacher Guide for each Investigation.