Table 4.

Comparison of Effective and Less Effective Teachers for Study 1

Variable	Effective Teachers (N =80)		Less Effective Teachers (N = 41)		Cohen’s d
	M	SD	M	SD
Grit Rating	4.16	1.43	3.54	1.50	0.42*
Leadership Rating	3.68	0.95	3.53	1.00	0.15
College GPA	3.57	0.27	3.53	0.26	0.15
SAT score	1344.84	131.04	1365.88	166.01	−0.14
School assignmenta
Middle school	38%		46%		−0.17
High school	20%		17%		0.07
Second year	46%		51%		−0.10
White	59%		62%		−0.04
Female	78%		70%		0.14

Note. N = 154, except for White, where N = 137 and SAT score where N = 125. Cohen’s d was calculated for categorical predictors from the phi coefficient using

method discussed in Rosenthal and DiMatteo (2001).

^*p< .05.

^**p< .01.

^***p< .001.

^aReference group is elementary school.