(Illinois Ho Math and Chess)
Research-Based and Data-Driven
Note: These results just in after 60 hours of math tutoring in the 2006-2007 Chess Academy Math Tutoring Program with a group of 119 students. The average gain per student was 19% on a standardized mathematics test. See analysis below:
Student Test Scores Pretest
Posttest
Gain
Grade 1 71 97 26 Grade 1 58 74 16 Grade 1 26 52 26 Grade 1 29 35 6 Grade 1 23 35 12 Grade 1 42 39 -3 Grade 1 48 74 26 Grade 1 29 94 65 Grade 1 39 84 45 Grade 1 26 52 26 Grade 1 39 55 16 Grade 1 68 77 9 Grade 1 52 84 32 Grade 1 58 68 10 Grade 1 35 61 26 Grade 2 50 78 28 Grade 2 69 69 0 Grade 2 47 81 34 Grade 2 67 81 14 Grade 2 50 61 11 Grade 2 58 47 -11 Grade 2 69 75 6 Grade 2 47 50 3 Grade 2 61 86 25 Grade 2 3 47 44 Grade 2 72 83 11 Grade 2 67 81 14 Grade 2 72 92 20 Grade 2 72 83 11 Grade 3 35 65 30 Grade 3 40 48 8 Grade 3 43 60 17 Grade 3 55 70 15 Grade 3 27 85 58 Grade 3 25 62 37 Grade 3 35 82 47 Grade 4 27 32 5 Grade 4 43 56 13 Grade 4 42 72 30 Grade 4 34 38 4 Grade 4 25 77 52 Grade 4 55 47 -8 Grade 4 28 63 35 Grade 4 42 84 42 Grade 4 27 69 42 Grade 4 23 44 21 Grade 4 33 44 11 Grade 4 50 61 11 Grade 4 30 59 29 Grade 4 31 78 47 Grade 4 36 59 23 Grade 4 39 73 34 Grade 4 39 34 -5 Grade 4 20 47 27 Grade 4 30 59 29 Grade 4 23 73 50 Grade 5 16 34 18 Grade 5 28 50 22 Grade 5 41 38 -3 Grade 5 52 55 3 Grade 5 33 59 26 Grade 5 45 67 22 Grade 5 13 33 20 Grade 5 25 33 8 Grade 5 17 44 27 Grade 5 23 64 41 Grade 5 34 69 35 Grade 5 20 50 30 Grade 5 39 47 8 Grade 5 33 38 5 Grade 5 11 30 19 Grade 5 23 36 13 Grade 5 36 47 11 Grade 5 17 83 66 Grade 5 28 38 10 Grade 5 34 33 -1 Grade 5 8 34 26 Grade 5 30 47 17 Grade 5 20 20 0 Grade 5 23 52 29 Grade 5 42 91 49 Grade 5 20 39 19 Grade 5 38 53 15 Grade 5 11 44 33 Grade 5 75 86 11 Grade 5 14 20 6 Grade 5 28 44 16 Grade 5 48 69 21 Grade 5 31 69 38 Grade 5 11 23 13 Grade 5 30 47 17 Grade 6 53 49 -4 Grade 6 25 43 18 Grade 6 26 57 31 Grade 6 32 33 1 Grade 6 42 56 14 Grade 6 25 43 18 Grade 6 22 42 20 Grade 6 29 43 14 Grade 6 42 46 4 Grade 6 31 46 15 Grade 6 29 35 6 Grade 6 35 61 26 Grade 7 37 28 -9 Grade 7 51 47 -4 Grade 7 25 25 0 Grade 7 60 81 21 Grade 7 26 24 -2 Grade 8 26 35 9 Grade 8 38 43 5 Grade 8 36 71 35 Grade 8 61 85 24 Grade 8 24 28 4 Grade 8 19 21 2 Grade 8 44 63 18 Grade 8 19 67 47 Grade 8 31 24 -7 Grade 8 32 44 12 Grade 8 38 36 -2 36.46218 55.44538 18.97479 Paired t test results
P value and statistical significance:
The two-tailed P value is less than 0.0001
By conventional criteria, this difference is considered to be extremely statistically significant.
Confidence interval:
The mean of Group One minus Group Two equals -18.98
95% confidence interval of this difference: From -21.90 to -16.06
Intermediate values used in calculations:
t = 12.8729
df = 118
standard error of difference = 1.475
Review your data:
Group Group One Group Two Mean 36.46 55.45 SD 15.82 19.37 SEM 1.45 1.78 N 119 119 Source: http://www.graphpad.com/quickcalcs/ttest2.cfm