Table ES.1. Impacts on Reading Achievement, Cohort 1 Follow-Up Respondent Sample

Table ES.1. Impacts on Reading Achievement, Cohort 1 Follow-Up Respondent Sample
Outcome	ERO	Non-ERO Group	Estimated Impact	Estimated Impact Effect Size	P-Value for Estimated Impact
All Schools

Reading comprehension
Average standard score	90.1	89.2	0.9 *	0.09 *	0.019
Corresponding grade equivalent	6.1	5.9
Corresponding percentile	25	23

Reading vocabulary
Average standard score	93.4	93.2	0.3	0.03	0.472
Corresponding grade equivalent	7.7	7.7
Corresponding percentile	32	31

Sample size	1,408	1,005

Reading Apprenticeship schools

Reading comprehension
Average standard score	89.8	88.9	0.9	0.09	0.097
Corresponding grade equivalent	6.1	5.9
Corresponding percentile	24	23

Reading vocabulary
Average standard score	93.2	92.8	0.5	0.05	0.393
Corresponding grade equivalent	7.7	7.7
Corresponding percentile	31	31

Sample size	686	454

Xtreme Reading schools

Reading comprehension
Average standard score	90.5	89.6	0.9	0.09	0.090
Corresponding grade equivalent	6.2	6.0
Corresponding percentile	25	24

Reading vocabulary
Average standard score	93.6	93.5	0.1	0.01	0.846
Corresponding grade equivalent	7.8	7.8
Corresponding percentile	32	32

Sample size	722	551
NOTE: The statistical significance level is indicated (*) when the p-value is less than or equal to 5 percent.