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Table 1 STeLLA-II impact estimates

From: Design principles for effective video-based professional development

Outcome

Unstandardized treatment effect

Standard error

t

df

p

Hedges’ g (WWC)

Student achievement

6.11 [4.46, 7.76]

0.84

7.27

74

<.001

0.68 [0.60, 0.76]

Teacher content knowledge

4.77 [3.26, 6.28]

0.77

6.16

75

<.001

0.66 [0.31, 1.00]

Teacher pedagogical content knowledge

5.33 [3.74, 6.92]

0.81

6.58

75

<.001

1.17 [0.81, 1.53]

Teaching practice

15.60 [13.01, 18.19]

1.32

11.78

75

<.001

2.05 [1.63, 2.47]