Table 2b

Probability of Completing Algebra I by Eighth Grade, Other Large Districts

District	“Pre” Cohorts Percent	“Post I” Cohorts Percent	“Post II” Cohorts Percent	Observed Range	p-value for Test of Equality Across Three Periods
Group 1: Districts exhibiting no significant variation across time periods
Wake	30.47	30.36	29.91	0.56	0.554
Union	22.92	23.78	22.18	1.6	0.268
Johnston	24.18	24.24	24.96	0.78	0.712
Gaston	15.77	15.78	16.40	0.63	0.646
Group 2: Districts exhibiting statistically significant variation across time periods
Cumberland	14.08	10.92	17.82	6.9	< 0.001
Forsyth	37.21	31.03	32.30	6.18	< 0.001
Durham	24.49	19.11	23.51	5.38	< 0.001
Cabarrus	14.51	16.92	17.23	2.72	< 0.001

Notes: The “Pre” cohorts consist of students entering seventh grade for the first time in 1999–2000 or 2000–2001. The “Post I” cohorts entered seventh grade in 2001–2002 or 2002–2003. The “Post II” cohorts entered seventh grade in 2003–2004 or 2004–2005. Reported p-values are derived from χ² tests.