1. CLICK BELOW TO BEGIN! Using a baseball statistic to help you learn math!

2. Useful Tips This button will take you to the HOME screen This Button will advance you to the next page This button will take you to the previous page This button will take you to the Exam

3. Home C lick on an exercise to get warmed up. Or, you could watch a video on ERA for some extra stretching. When your arm is nice and loose, go a head and take the mound by taking the exam.

4. Learning ERA ERA stands for: It is a way of telling how productive a pitcher is during the course of a season, and his career.

5. Learning ERA Earned Run: “Every time a run scores on a hit, sacrifice, sacrifice fly, wild pitch, bunt, base on balls, stolen base, fielder's choice, put-out, or balk a pitcher will be charged an earned run.”sacrifice flywild pitch base on ballsstolen basefielder's choicebalk

6. Learning ERA Sacrifice Fly: ”Occurs when a batter’s caught fly ball ends in a runner tagging up and advancing to the next base”

7. Learning ERA Wild Pitch: “Any pitch that bounces on the ground and allows the runners to advance to the next base.”

8. Learning ERA Base on Balls: “An award of first base o a batter receiving four balls pitched outside of the strike zone.” Base on balls and the term “walk” mean the same thing.

9. Learning ERA Stolen Base: “The act of a runner gaining a base without the help of a hit, an error, or a walk. Occurs when the pitched ball is on its way to the batter.”

10. Learning ERA Fielder’s Choice: When a fielder elects to throw the ball to a point other than first base to record a put-out

11. Learning ERA Balk: An illegal maneuver by the pitcher when there is a runner or runners on the base. The runners automatically proceed to the next base when balk is called.

12. Learning ERA Unearned Run: A run scored as the result of defensive errors

13. Learning ERA What is a good ERA? An ERA is an average, therefore, a smaller average of earned runs scored is better than a larger average of earned runs scored. Low ERAHigh ERA – Click home to go to the next section

14. Practicing ERA Equation for finding ERA: # of EARNED runs# of innings pitched 9 You multiply by 9 because an ERA is the average number of earned runs a pitcher gives up per full game. A regular baseball game consists of 9 innings.

15. Practicing ERA -Click a number to get started

16. Practicing ERA Which is the correct ERA for Chicago Cubs pitcher Ryan Dempster? – 2011 Pitching Statistics Innings Pitched:202.1 Earned Runs:108 Walks:82 Strike outs:191 A)4.804.80 B)22.222.2 C)1.871.87

17. Practicing ERA Nice Pitch! Ryan Dempster earned a 4.80 ERA during the 2011 season

18. Practicing ERA You Walked Him! Try again by clicking the back button. Remember: [# of EARNED runs ÷ # of innings pitched × 9]

19. Practicing ERA Which is the correct ERA for New York Yankees pitcher Mariano Rivera? – 2011 Pitching Statistics Innings Pitched:61.1 Earned Runs:13 Walks:8 Strike outs:60 A)4.704.70 B)1.201.20 C)1.911.91

20. Practicing ERA Nice Pitch! Mariano Rivera earned a 1.91 ERA during the 2011 season

21. Practicing ERA You Walked Him! Try again by clicking the back button. Remember: [# of EARNED runs ÷ # of innings pitched × 9]

22. Practicing ERA Which is the correct ERA for Miami Marlins pitcher Ryan Webb? – 2011 Pitching Statistics Innings Pitched:50.2 Earned Runs:18 Walks:20 Strike outs:31 A)1.081.08 B)3.203.20 C)2.632.63

23. Practicing ERA Nice Pitch! Ryan Webb earned a 3.20 ERA during the 2011 season

24. Practicing ERA You Walked Him! Try again by clicking the back button. Remember: [# of EARNED runs ÷ # of innings pitched × 9]

25. Practicing ERA Which is the correct ERA for Colorado Rockies pitcher Matt Reynolds? – 2011 Pitching Statistics Innings Pitched:50.2 Earned Runs:23 Walks:1 Strike outs:50 A)3.093.09 B)1.091.09 C)4.094.09

26. Practicing ERA Nice Pitch! Matt Reynolds earned a 4.09 ERA during the 2011 season

27. Practicing ERA You Walked Him! Try again by clicking the back button. Remember: [# of EARNED runs ÷ # of innings pitched × 9]

28. Practicing ERA Which is the correct ERA for San Francisco Giants pitcher Tim Lincecum? – 2011 Pitching Statistics Innings Pitched:217 Earned Runs:66 Walks:86 Strike outs:220 A)4.274.27 B)7.247.24 C)2.742.74

29. Practicing ERA Nice Pitch! Tim Lincecum earned a 2.74 ERA during the 2011 season

30. Practicing ERA You Walked Him! Try again by clicking the back button. Remember: [# of EARNED runs ÷ # of innings pitched × 9]

31. Practicing ERA Which is the correct ERA for Cincinnati Reds pitcher Bronson Arroyo? – 2011 Pitching Statistics Innings Pitched:199 Earned Runs:112 Walks:45 Strike outs:108 A)1.671.67 B)7.057.05 C)5.075.07

32. Practicing ERA Nice Pitch! Bronson Arroyo earned a 5.07 ERA during the 2011 season

33. Practicing ERA You Walked Him! Try again by clicking the back button. Remember: [# of EARNED runs ÷ # of innings pitched × 9]

34. Practicing ERA Which is the correct ERA for Washington Nationals pitcher Stephen Strasburg? – 2011 Pitching Statistics Innings Pitched:24 Earned Runs:4 Walks:2 Strike outs:24 A)1.501.50 B)1.001.00 C)2.052.05

35. Practicing ERA Nice Pitch! Stephen Strasburg earned a 1.50 ERA during the 2011 season

36. Practicing ERA You Walked Him! Try again by clicking the back button. Remember: [# of EARNED runs ÷ # of innings pitched × 9]

37. Practicing ERA Which is the correct ERA for St. Louis Cardinals pitcher Chris Carpenter? – 2011 Pitching Statistics Innings Pitched:237.1 Earned Runs:91 Walks:55 Strike outs:191 A)5.345.34 B)3.453.45 C)4.534.53

38. Practicing ERA Nice Pitch! Chris Carpenter earned a 3.45 ERA during the 2011 season

39. Practicing ERA You Walked Him! Try again by clicking the back button. Remember: [# of EARNED runs ÷ # of innings pitched × 9]

40. Practicing ERA Which is the correct ERA for Milwaukee Brewers pitcher Randy Wolf? – 2011 Pitching Statistics Innings Pitched:212.1 Earned Runs:87 Walks:66 Strike outs:134 A)3.693.69 B)3.963.96 C)3.663.66

41. Practicing ERA Nice Pitch! Randy Wolf earned a 3.69 ERA during the 2011 season

42. Practicing ERA You Walked Him! Try again by clicking the back button. Remember: [# of EARNED runs ÷ # of innings pitched × 9]

43. Practicing ERA Which is the correct ERA for Atlanta Braves pitcher Tim Hudson? – 2011 Pitching Statistics Innings Pitched:215 Earned Runs:77 Walks:56 Strike outs:158 A)3.223.22 B)2.322.32 C)2.232.23

44. Practicing ERA Nice Pitch! Tim Hudson earned a 3.22 ERA during the 2011 season

45. Practicing ERA You Walked Him! Try again by clicking the back button. Remember: [# of EARNED runs ÷ # of innings pitched × 9]

46. Practicing ERA BONUS Chicago Cubs pitcher, Kerry Wood, had a 3.35 ERA with 19 earned runs. Find the number of innings he pitcher during the 2011 season. Be careful because you only get one shot! A)9.60D)10.19.6010.1 B)6.70E)51.06.7051.0 C)70.6F)60.970.660.9

47. Practicing ERA Nice Pitch! Kerry Wood Pitched 51.0 innings during the 2011 season

48. Practicing ERA You Walked Him! It’s okay, you’ll get him next time. Keep your head up and keep working hard! Remember: [# of EARNED runs ÷ # of innings pitched × 9]

49. Ranking ERA Remember? An ERA indicates the average number of earned runs a pitcher gives up per game (9 innings). So, a low ERA is more desirable than a high ERA. Low ERAHigh ERA

50. Ranking ERA Presented with a list, rank the given ERA’s in order of best ERA to worst ERA. – [1.69, 3.75, 1.96, 4.30, 2.01] A) 2.01, 3.75, 4.30, 1.69, 1.962.01, 3.75, 4.30, 1.69, 1.96 B) 1.69, 1.96, 2.01, 3.75, 4.301.69, 1.96, 2.01, 3.75, 4.30 C) 4.30, 3.75, 2.01, 1.96, 1.694.30, 3.75, 2.01, 1.96, 1.69 D) 2.01, 3.75, 1.96, 4.30, 1.692.01, 3.75, 1.96, 4.30, 1.69

51. Ranking ERA Nice Pitch! The order: 1.69, 1.96, 2.01, 3.75, 4.30 is correct!

52. Ranking ERA You Walked Him! Try again by clicking the back button. Remember: [ Low ERAHigh ERA]

53. Ranking ERA Presented with a list of pitchers and their ERA’s, rank the pitchers from best to worst. – [Ryan Dempster: 4.80, Mariano Rivera: 1.91, Bronson Arrayo: 5.07, Stephen Strasburg: 1.50] A) Dempster, Rivera, Arroyo, StrasburgDempster, Rivera, Arroyo, Strasburg B) Rivera, Strasburg, Dempster, Arroyo Rivera, Strasburg, Dempster, Arroyo C) Strasburg, Dempster, Rivera, Arroyo Strasburg, Dempster, Rivera, Arroyo D) Strasburg, Rivera, Dempster, ArroyoStrasburg, Rivera, Dempster, Arroyo

54. Ranking ERA Nice Pitch! The order: Strasburg, Rivera, Dempster, Arroyo is correct!

55. Ranking ERA You Walked Him! Try again by clicking the back button. Remember: [ Low ERAHigh ERA]

56. World Series Game 7 REVIEW Good vs. Bad ERAHow to Find ERA Earned vs. Unearned Runs Click here to take the mound! - Choose and click a section to review

57. World Series Game 7 Earned vs. Unearned Run Do you remember? Earned Run: Every time a run scores on a hit, sacrifice, sacrifice fly, wild pitch, bunt, base on balls, stolen base, fielders choice, put-out, or balk a pitcher will receive an earned run Unearned Run: A run scored as a result of a defensive error

58. World Series Game 7 How to find ERA Remember, ERA stands for Earned Run Average [# of EARNED runs ÷ # of innings pitched × 9]

59. World Series Game 7 Good vs. Bad ERA Remember ERA indicates the average number of earned runs a pitcher gives up per game (9 innings) Good ERA = Low ERA Bad ERA= High ERA

60. World Series Game 7 1)Which is the correct definition of ERA? A)Earned Run AdvantageEarned Run Advantage B)Earned Run AverageEarned Run Average C)Every Run AverageEvery Run Average

61. World Series Game 7 Nice Pitch! ERA: Earned Run Average

62. World Series Game 7 You Walked Him! Try again by clicking the back button

63. World Series Game 7 2) Decide if the run scored was earned or unearned. [Run scored on a sacrifice bunt] A)EarnedEarned B)UnearnedUnearned C)Either one worksEither one works

64. World Series Game 7 Nice Pitch! Right! Earned Run!

65. World Series Game 7 You Walked Him! Try again by clicking the back button

66. World Series Game 7 3) Decide if the run scored was earned or unearned. [Run scored as a result of an error made by the first baseman] A)EarnedEarned B)UnearnedUnearned C)Either on worksEither on works

67. World Series Game 7 Nice Pitch! Right! unearned Run!

68. World Series Game 7 You Walked Him! Try again by clicking the back button

69. World Series Game 7 4) Find the ERA of a pitcher with the given stats: Earned Runs:24 Innings pitched:204.7 Base on Balls:5 Strike outs:60 A)76.576.5 B)2.642.64 C)1.061.06

70. World Series Game 7 Nice Pitch! Right! 1.06 ERA!

71. World Series Game 7 You Walked Him! Try again by clicking the back button

72. World Series Game 7 5) Find the ERA of a pitcher with the given stats: Earned Runs:45 Innings pitched:175.4 Base on Balls:60 Strike outs:18 A)2.302.30 B)2.312.31 C)3.903.90

73. World Series Game 7 Nice Pitch! Right! 2.31 ERA!

74. World Series Game 7 You Walked Him! Try again by clicking the back button

75. World Series Game 7 6) Rank the given ERA’s from best to worst: [1.91, 7.91, 0.98] A)1.91, 0.98, 7.911.91, 0.98, 7.91 B)7.91, 1.91, 0.987.91, 1.91, 0.98 C)0.98, 1.91, 7.910.98, 1.91, 7.91

76. World Series Game 7 Nice Pitch! Right! 0.98, 1.91, 7.91

77. World Series Game 7 You Walked Him! Try again by clicking the back button

78. World Series Game 7 7) Rank these pitchers from best ERA to worst ERA: [J. Shapiro: 1.37, C. Mong: 10.98, D. Hartman: 2.76] A)C. Mong, D. Hartman, J. ShapiroC. Mong, D. Hartman, J. Shapiro B)D. Hartman, C. Mong, J. ShapiroD. Hartman, C. Mong, J. Shapiro C)J. Shapiro, D. Hartman, C. MongJ. Shapiro, D. Hartman, C. Mong

79. World Series Game 7 Nice Pitch! Right! J. Shapiro, D. Hartman, C. Mong

80. World Series Game 7 You Walked Him! Try again by clicking the back button

81. You Won the World Series! Good job Kid! You won your team the World Series! Keep up the hard work, and keep your ERA down! Nice pitching!

82. Video on ERA