1. Overall Random Effects Uncorrected ES Percentile Gain Fail-safe N.37 (N=85) 143,060 Corrected ES Percentile Gain Fail-safe N.44 (N=85) 173,655

2. Random Effects for Length of Teaching (in years) Uncorrected Quartile Range ES Percentile Gain 2 to 5.34 (N=16) 13 6 to 9.33 (N=18) 13 10 to 15.36 (N=22) 14 16 to 32.42 (N=15) 16 Corrected Quartile Range ES Percentile Gain 2 to 5.42 (N=16) 16 6 to 9.39 (N=18) 15 10 to 15.44 (N=22) 17 16 to 32.51 (N=15) 20

3. Random Effects for Length of Tool Use (in months) Uncorrected Quartile Range ES Percentile Gain 1 to 5.27 (N=17) 11 5 to 18.31 (N=20) 12 24 to 27.43 (N=16) 17 30 to 60.42 (N=18) 16 Corrected Quartile Range ES Percentile Gain 1 to 5.32 (N=17) 13 5 to 18.38 (N=20) 15 24 to 27.53 (N=16) 20 30 to 60.51 (N=18) 20

4. Random Effects for Percentage of Time Tools Used in the Classroom Uncorrected Quartile Range ES Percentile Gain 10 to 40.09 (N=18) 4 45 to 70.40 (N=18) 16 75 to 80.67 (N=18) 25 85 to 95.18 (N=17) 7 Corrected Quartile Range ES Percentile Gain 10 to 40.11 (N=18) 4 45 to 70.48 (N=18) 18 75 to 80.82 (N=18) 29 85 to 95.22 (N=17) 9

5. Random Effects for Confidence in Promethean Technology Use Uncorrected Scale Response ES Percentile Gain 1-- 2.18 (N=3) 7 3.33 (N=18) 13 4.33 (N=32) 13 5.48 (N=18) 18 Corrected Scale Response ES Percentile Gain 1-- 2.20 (N=3) 8 3.38 (N=18) 15 4.41 (N=32) 16 5.59 (N=18) 22