Table 3.

Mean total scores as a function of age in mathematical and intelligence measures.

	Calculation	Fluency	Applied problems	Quantitative concepts	Math calculation skills	Math reasoning	IQ composite
Age	M (SD)	M (SD)	M (SD)	M (SD)	M (SD)	M (SD)	M (SD)
6	7.11 (2.93)	13.22 (11.48)	23.28 (4.59)	19.61 (4.67)	464.72 (17.67)	454.39 (16.56)	107.78 (12.98)
7	11.33 (1.82)	35.00 (7.71)	29.50 (2.39)	26.83 (5.11)	483.4 (5.48)	479.58 (12.59)	107.25 (12.85)
8	14.18 (2.91)	38.59 (10.46)	32.00 (4.51)	29.96 (4.97)	489.96 (7.19)	488.93 (15.3)	103.11 (13.30)
9	16.30 (3.01)	49.17 (16.93)	33.96 (4.54)	32.00 (5.81)	496.57 (8.47)	496.04 (16.18)	92.78 (11.09)
10	17.42 (2.22)	61.42 (19.26)	35.89 (3.83)	34.47 (3.13)	501.16 (6.61)	503.37 (10.10)	96.05 (12.45)
11	19.80 (2.25)	64.40 (23.75)	40.00 (4.83)	38.00 (3.50)	503.10 (13.94)	511.60 (19.82)	96.20 (12.89)