TABLE 1.

Lesson length, energy expenditure, and minutes per lesson for girls' activity and lesson contexts.

	All Lessons	Field Site	Test of Equality across Field Sites
	(N = 431) Mean (SD)	(N = 70−74) Range	F	P	r
Lesson length (min)	37.3 (9.4)	34.0−40.0	0.46	0.804	0.27
Lesson TEE (kcal·kg⁻¹)	2.7 (0.8)	2.4−3.0	1.30	0.292	0.42
Student activity (min)
Lying down	0.2 (0.7)	0.0−0.6	3.16	0.021	0.59
Sitting	11.9 (9.6)	6.6−17.3	6.23	<0.001	0.71
Standing	11.3 (6.5)	7.6−15.0	2.98	0.026	0.58
Walking	9.1 (5.5)	5.7−13.2	7.87	0.000	0.75
Vigorous	4.8 (4.2)	1.7−6.4	4.50	0.004	0.65
MVPA	13.9 (7.0)	9.0−18.8	6.01	0.001	0.71
Lesson context (min)
Management	9.6 (5.2)	7.7−13.3	3.54	0.012	0.61
Knowledge	3.9 (5.4)	0.5−6.0	5.95	0.001	0.71
Fitness activity	7.1 (8.7)	2.6−10.2	2.88	0.031	0.57
Skill drills	4.3 (7.4)	2.8−5.6	0.91	0.485	0.36
Game play	10.9 (12.5)	8.3−15.3	0.78	0.575	0.34
Free play	1.4 (5.7)	0.0−4.0	0.76	0.585	0.34

TAAG field site comparisons: ndf = 5; ddf = 30. TEE, total energy expenditure estimation; MVPA, moderate to vigorous physical activity (walking + vigorous).